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PLOS One logoLink to PLOS One
. 2020 Nov 30;15(11):e0242249. doi: 10.1371/journal.pone.0242249

‘Intelligent’ lockdown, intelligent effects? Results from a survey on gender (in)equality in paid work, the division of childcare and household work, and quality of life among parents in the Netherlands during the Covid-19 lockdown

Mara A Yerkes 1,*, Stéfanie C H André 2,#, Janna W Besamusca 4,#, Peter M Kruyen 2,#, Chantal L H S Remery 5,#, Roos van der Zwan 6,#, Debby G J Beckers 3, Sabine A E Geurts 3
Editor: Srinivas Goli7
PMCID: PMC7703961  PMID: 33253238

Abstract

Objective

The COVID-19 pandemic is more than a public health crisis. Lockdown measures have substantial societal effects, including a significant impact on parents with (young) children. Given the existence of persistent gender inequality prior to the pandemic, particularly among parents, it is crucial to study the societal impact of COVID-19 from a gender perspective. The objective of this paper is to use representative survey data gathered among Dutch parents in April 2020 to explore differences between mothers and fathers in three areas: paid work, the division of childcare and household tasks, and three dimensions of quality of life (leisure, work-life balance, relationship dynamics). Additionally, we explore whether changes take place in these dimensions by comparing the situation prior to the lockdown with the situation during the lockdown.

Method

We use descriptive methods (crosstabulations) supported by multivariate modelling (linear regression modelling for continuous outcomes; linear probability modelling (LPM) for binary outcomes (0/1 outcomes); and multinomial logits for multinomial outcomes) in a cross-sectional survey design.

Results

Results show that the way in which parents were impacted by the COVID-19 pandemic reflects a complex gendered reality. Mothers work in essential occupations more often than fathers, report more adjustments of the times at which they work, and experience both more and less work pressure in comparison to before the lockdown. Moreover, mothers continue to do more childcare and household work than fathers, but some fathers report taking on greater shares of childcare and housework during the lockdown in comparison to before. Mothers also report a larger decline in leisure time than fathers. We find no gender differences in the propensity to work from home, in perceived work-life balance, or in relationship dynamics.

Conclusion

In conclusion, we find that gender inequality in paid work, the division of childcare and household work, and the quality of life are evident during the first lockdown period. Specifically, we find evidence of an increase in gender inequality in relation to paid work and quality of life when comparing the situation prior to and during the lockdown, as well as a decrease in gender inequality in the division of childcare and household work. We conclude that the unique situation created by restrictive lockdown measures magnifies some gender inequalities while lessening others.

Discussion

The insights we provide offer key comparative evidence based on a representative, probability-based sample for understanding the broader impact of lockdown measures as we move forward in the COVID-19 pandemic. One of the limitations in this study is the cross-sectional design. Further study, in the form of a longitudinal design, will be crucial in investigating the long-term impact of the COVID-19 pandemic on gender inequality.

Introduction

Gender inequality pertaining to the unequal division of tasks and/or resources between men and women is one of the most persistent social problems of the 21st century [1, 2]. This ongoing inequality particularly affects men and women’s lives across the dimensions of paid work, the division of childcare and household work [36]), and quality of life (including leisure time [7, 8], work-life balance [3, 4], and for those in a relationship, relationship dynamics [5, 6]).

The COVID-19 pandemic and far-reaching measures taken by governments to reduce the spread of the virus have the potential to substantially impact these patterns of gender inequality, especially within families with children. Preliminary evidence suggests that particularly in the Global North, the pandemic further divides an already gendered labour market. Women are overrepresented in public sector occupations such as health care, education, and childcare [9]. In the health care sector alone, three-fourths (76%) of European workers are women [10]. Women are similarly overrepresented in health care and community/social service sectors in the US [11] and Australia [12]. These commonly underpaid and undervalued occupations became essential during the COVID-19 pandemic; consequently, many mothers continue to work outside the home. Simultaneously, other female-dominated industries, such as retail, accommodation services, and food and beverage service activities, have been disproportionately affected by lockdown measures because of the (temporary) termination of their services. Therefore, women more than men are likely to see the greatest job losses and reductions in working hours during the pandemic and its aftermath [9]. Further attempts to slow the spread of COVID-19 include office closures and a sudden increase in working from home, measures which also have the potential to substantially impact patterns of gender inequality. In the US, early estimates suggest half of the workforce worked or is working from home full time during the pandemic [13]. In Europe, more than one third (37%) of employees were working from home at the height of the first wave of the pandemic, although this percentage varies across countries, ranging from nearly 20% in Romania to nearly 60% in Finland. Of those working from home in April 2020, one third were parents with children under the age of 18 [14]. Furthermore, childcare centres and schools were temporarily closed in most countries during the first wave and social distancing measures discouraged others, such as grandparents, from caring for (grand)children, limiting alternatives to formal or parental care. Care and home-schooling responsibilities thus shifted fully onto parents, which may further impact paid work, the division of childcare and household work, and the quality of life among parents in gender unequal ways.

However, it is not yet clear how the sudden changes introduced by COVID-19 lockdown measures impact these three areas of gender inequality. On the one hand, COVID-19 lockdown measures potentially magnify existing gender inequalities, for example by reaffirming women’s caregiving role [15, 16]. Initial evidence from countries such as Australia, the UK, the US, and Germany confirm this effect [1719]. In these countries, women spend more time each day on care tasks than men, resulting in an increase in time spent on caregiving tasks during the pandemic. In Australia, Cooper and Mosseri [18] suggest women experience a triple burden during the pandemic: many women face stressful and risky work on the frontlines given their overrepresentation in essential occupations, they are witnessing the greatest losses in jobs and hours, and their unpaid care work at home is increasing. On the other hand, COVID-19 lockdown measures have the potential to reduce existing gender inequalities. Given women’s overrepresentation in essential occupations and the concurrent push for non-essential workers to work from home, as well as the absence of care alternatives, families may be forced to (re)negotiate the division of childcare and/or household work [20]. In the US, for example, Carlson, Pepin and Petts [19] show that while women still do more caregiving tasks than men, men are doing more than before the pandemic, and almost no men report doing less.

For a thorough understanding of the impact of the COVID-19 pandemic on gender inequality in paid work, the division of childcare and household tasks, and quality of life, more evidence, particularly based on representative data, is needed from additional countries, such as Canada and/or other European countries, as country context and culture are crucial for understanding social processes [21]. There is significant cross-national variation in lockdown measures and supportive social policies in place [22], making country context vital for understanding the short and long-term impact of COVID-19 on gender inequality.

The Netherlands presents an interesting case study for furthering this evidence base for two reasons. First, the Netherlands was criticized internationally for its unique and comparatively lenient first-wave lockdown measures, coined by the government as an ‘intelligent’ lockdown, a concept explained in more detail in the next paragraph [23]. Second, the Dutch case is interesting for investigating gender inequality because in comparison to other European countries, the Netherlands consistently scores high on gender equality indices in the domains of work, health and knowledge [24]. Thus, in European perspective, the division of tasks and resources between men and women is seen to be quite equal. Yet these high scores mask persistent and underlying gender inequality in multiple domains, particularly in relation to paid work and care. For nearly three decades now, the Netherlands is dominated by its ‘one-and-a-half earner model’: The majority of fathers works full-time, whereas the majority of mothers works part-time and spends significantly more time caring for children and doing household tasks [2527]. The so-called ‘intelligent’ lockdown could potentially be a catalyst to change the persistent structural gender inequalities embedded in this Dutch work and family model [28].

The Dutch lockdown measures

To restrict the spread of the virus, the Dutch government put restrictive measures in place from 15 March until early June 2020. The combination of measures is labelled an ‘intelligent’ lockdown by the Dutch government for their emphasis on individual responsibility rather than state enforcement, with the intent of minimizing the economic, social and psychological impact of the pandemic. The Dutch approach is viewed as relatively ‘soft’ in comparison to other European settings [29]. In reality, some measures were strict while others could be considered lenient. Strict measures included the closing of childcare centres, schools and universities; online classes and homework replaced on-site education to prevent student delays. Emergency care and schooling for children aged 0–12 was available only as a last resort to workers in essential occupations (including care (both youth care and social support), childcare, public transport, the food chain (e.g. supermarkets), the transport industry, waste/garbage collection/processing, media and communication, education, emergency services, necessary government processes, farming, and occupations in the funeral industry). Further strict lockdown measures included the prohibition of public gatherings and events, which effectively closed down firms and entrepreneurs in the catering and events sector. Bars, restaurants, hairdressers, gyms, and saunas were closed. Other measures, however, were less strict and open to interpretation. Shops and businesses able to maintain social distancing requirements (i.e., 1.5 meters distance between non-household members) could choose to continue operations on-site at their own discretion. Public spaces remained accessible, public transport remained operational, and people were not required to have written authorization for outings, travel or use of public transport [29]. Citizens were resolutely asked to refrain from unnecessary travel, to avoid crowded areas, and to work from home whenever possible. However, while families retained the possibility to spend time outside in the company of other household members or one non-household member as long as social distancing was maintained, social life effectively came to a standstill and leisure activities were significantly impacted.

Objective of the study

With no clear end to the COVID-19 pandemic in sight, social science insights into the impact of the pandemic on gender inequalities in paid work, the division of childcare and household tasks, and quality of life are crucial for understanding the effects of the pandemic on societal development and the need for short and long-term policy responses. The purpose of this cross-sectional study is to provide insights into the immediate impact of the first wave of lockdown measures using representative data. We answer the following research question: To what extent did the COVID-19 ‘intelligent’ lockdown impact gender differences in paid work, the division of childcare and household tasks, and quality of life of Dutch parents? In answering this question, we have three objectives: to investigate gender differences in 1) paid work (work location, working days and times, perceived work pressure); 2) the division of childcare and household tasks; and 3) quality of life (leisure, work-life balance, and relationship dynamics). We investigate these differences between mothers and fathers during the lockdown and provide a comparison to the situation prior to the pandemic. Meeting these objectives will inform labour market and family policies as well as broader social science debates on gender inequality during pandemics.

Methods

Study design

This study applied a cross-sectional survey design in which we were primarily interested in exploring gender differences. The survey questionnaire contained items measuring respondents’ paid work, the division of childcare and household tasks, and quality of life in April 2020 (i.e., one month following the start of the first lockdown in the Netherlands). The questionnaire also contained retrospective items on the same topics to measure change between the period prior to the COVID-19 lockdown measures and during the lockdown. The questionnaire was administered in the Dutch language and all questions referred to the full set of lockdown measures taken by the Dutch government as described above.

We developed and extensively tested questions for the survey questionnaire using a multi-step approach. In the first step, we developed an initial set of questions tapping into the situation at work and home before and during the lockdown. These questions were established using our knowledge of the literature and existing questionnaires. Subsequently, we focused on removing and/or adding questions based on project discussions, time available within the panel (7 minutes), and by comparing our question base with existing data modules that can be linked to the data we collected. In a final step, multiple rounds of pilot testing led to the refinement and finalization of the questions. The fielded questionnaire contained 26 questions. The final codebook including all questions and response categories is available from the Longitudinal Internet studies for the Social Sciences (LISS) panel archive [30].

Data collection

The survey questionnaire was administered by CentERdata, located at Tilburg University, the Netherlands, using their LISS panel. The LISS panel is a representative, online survey panel based on a true probability sample drawn by the Dutch National Statistics Office (CBS) from Dutch population registers. There is no self-selection into the sample and households without internet access are provided with the necessary broadband connection and computer if necessary. Refreshment samples are drawn periodically to ensure continued representativeness of the panel. The LISS panel consists of approximately 7,000 individuals (4,000 households). Fieldwork with our survey questionnaire took place between 13 and 28 April 2020, one month following the start of the first lockdown.

Sample. The target sample included all LISS panel members in a household with at least one member in paid employment and at least one child under the age of 18 living at home. Based on these inclusion criteria, 1,234 LISS panel members received the questionnaire. With a response rate of 71.3%, the final sample consisted of 868 respondents in 643 households. We excluded a total of 16 respondents from the analyses. 14 respondents were excluded because they did not meet the inclusion criteria; they reported that neither they nor their partner were in paid employment prior to the first COVID-19 lockdown. We excluded a further two respondents because they indicated they were not presently working but had completed the survey questions as if they were working (i.e., both respondents provided invalid data). The final analytic sample (all respondents included in the analysis) consisted of 852 respondents, 748 of whom were in paid work at the time of the survey and all of whom lived with at least one child under the age of 18. Most respondents were in a partnered household; a total of 71 single parents were included in the sample.

Ethical considerations

This study was evaluated and received ethical approval from the Faculty of Social and Behavioural Sciences from Utrecht University. Ethical approval for data collection rests with CentERdata, the LISS-panel administrator, who requires all respondents to sign a written, online informed consent form before participating in the panel.

Measurements

We explored three themes before and during the lockdown for both the respondent and their partner. The three themes were paid work, the division of childcare and household tasks, and quality of life. All items were self-assessed and reported by the respondent. Differences between the time period before and during the first COVID-19 lockdown were measured in two ways: First, by the introduction of retrospective items. Respondents were instructed in prompts for each question whether to report on their situation ‘prior to the COVID-19 pandemic’ or ‘right now’. Second, some questions asked respondents to compare their current situation to the pre-COVID-19 situation, querying whether something, e.g. work in the evening hours, happened ‘more or less often’ than before the COVID-19 lockdown measures.

Paid work

First, for both mothers and fathers, we assessed the impact of the first COVID-19 lockdown on paid work, focusing on changes in work location, the timing of work, and perceived work pressure. ‘Work location’ measured whether respondents and/or their partner worked from home (differentiating between usually working from home and working from home due to COVID-19), worked at the usual location outside the home (differentiating between required and voluntary working outside the home), combined work from home with working at the usual location outside the home, or being temporarily furloughed (at home because there is currently no work to do). Due to small numbers of respondents who always worked from home and those who were furloughed, this variable was recoded into four categories for the multivariate analysis: working (almost) all hours from home (= reference category), working partially from home, at normal workplace by choice, and at normal workplace due to nature of the work.

To measure changes in the timing of work, respondents were asked how often they currently worked on normal workdays, normal days off, evenings, and weekends in comparison to the time period before COVID-19. Respondents answered each of the four items in this matrix on a five-point scale ranging from ‘a lot less’ to ‘a lot more’. To aid the interpretation of the multinomial logistic regressions, each of these variables was recoded from five to three categories: no change in the amount of hours worked during the respective time period (= reference category), fewer hours worked (combined categories of ‘a lot less’ and ‘a little less’) and more hours worked (combined categories of ‘a little more’ and ‘a lot more’).

Lastly, perceived work pressure measured whether respondents experienced more, the same or less work pressure during the lockdown compared to prior to the lockdown. This was measured using seven non-ordinal response categories. To ease interpretation of the analysis and avoid categories with small numbers of respondents, we recoded this variable into three categories. The items used in the analysis distinguished between the same amount of work pressure as prior to the lockdown (= reference category), less work pressure, and more work pressure. ‘Same work pressure’ is a combined category of ‘not experiencing any work pressure during the lockdown nor prior to the lockdown’ and ‘the same amount of work pressure now as before’). Less work pressure is a combined category of ‘didn’t experience any work pressure during the lockdown, but did experience work pressure prior to the lockdown’, with ‘much less work pressure’ and ‘slightly less work pressure’ compared to prior to the COVID-19 lockdown. Similarly, more work pressure is a combined category of ‘slightly more work pressure’ and ‘much more work pressure’ compared to prior to the lockdown.

The division of childcare and household tasks

Second, to examine the impact on dynamics at home, we asked respondents about the division of childcare and household tasks before and during the lockdown. Respondents indicated, relative to their partner, how much housework and, in separate questions, how much caregiving tasks (including home schooling and help with homework) they did prior to and during the lockdown. These questions were each measured separately using a 7-point scale ranging from ‘I do nearly everything’ (1) to ‘My partner does nearly everything’ (7). Based on a comparison of the situation before and during the lockdown, two new variables were computed, one indicating whether the relative share of the respondent had increased (1 = yes, 0 = no (reference category)) and one indicating whether the relative share had decreased (1 = yes, 0 = no (reference category)). This was done for household tasks and childcare separately.

Quality of life

Third, we examined the impact of the lockdown on mothers’ and fathers’ quality of life, by exploring changes in leisure time, perceived work-life balance, and relationship dynamics (disagreements with partners relating to the location of work, the division of childcare and household tasks, and leisure time). Change in leisure time was measured on a 5-point scale, ranging from having much less leisure time compared to before the lockdown (1), to having much more leisure time than before the lockdown (5). Given the skewed distribution of these data, these five categories were recoded into three categories: (much) less leisure time (a combination of much less and slightly less leisure time), no change in leisure time (= reference category), and (much) more leisure time (a combination of slightly less and much more leisure time).

Work-life balance was measured using an adapted measure from the European Foundation of Living and Working Conditions (EUROFOUND) Quality of Life survey. Two questions asked respondents to report on how easy or difficult it was to combine paid work with care (including home schooling and homework) for the period prior to the COVID-19 lockdown and during the lockdown; responses were measured on a 5-point Likert-scale ranging from (1) very easy to (5) very difficult.

Furthermore, we measured relationship dynamics by asking respondents how often they had disagreements with their partner before the lockdown about five issues: work location, scheduling of working hours, housework, caring for children, and leisure time. The answer categories for these items were (1) never, (2) monthly, (3) sometimes, (4) weekly and (5) almost daily. We measured changes between the pre-lockdown situation and the lockdown by asking respondents to compare the frequency of disagreements on the same five issues during the lockdown compared to the period prior to the lockdown. All five items were measured on a five-point scale ranging from (1) a lot less often to (5) a lot more often. Given the distribution of the data, we recoded this variable to less conflict with my partner (1 = yes, 0 = no (reference category)) and more conflict with my partner (1 = yes, 0 = no (reference category)).

Covariates

Our gender measure was included from existing LISS data modules, which applies a binary variable (women = reference category). Non-binary options are not included in these modules. The other covariates included in the analyses were: essential occupation, age, sector, educational level, number of children, and school status of children. Respondents were provided the government list of essential occupations and asked whether they (non-essential = reference category) and/or their partner (partner in non-essential occupation = reference category) worked in an essential occupation. In addition, we controlled for several socio-demographic characteristics, including age (in years, centred on the grand mean), sector ((semi)-public, private sector = reference category, sector unknown), educational level (low: primary or secondary qualifications = reference category; medium: vocational qualifications; high: tertiary education), number of children, and school status of children under 18 living in the household (measured here as children of primary-school age, children of secondary-school age, children of both primary-school and secondary-school age, and children not attending school = reference category). This last category included both children under school age (0–4) as well as children who already finished secondary school.

Descriptive data on the sample using these measures can be found in S1A Table. Half of all working mothers (56%) were employed in an essential occupation during the lockdown, compared to 34% of fathers. Mothers constituted 65% of all essential workers. We note that based on average marginal effects, Dutch fathers were less likely (16 percentage points) to work in an essential occupation than mothers (see S1B Table). Most essential workers were employed in the (semi)public sector.

Fifty-seven percent of households and 46% of respondents in the sample reported that at least one parent was employed in an essential occupation. Sixty-one percent of these households reported that one parent was an essential worker while the other was either not in employment or employed in a non-essential occupation. The remaining households contained families where both parents were employed in essential occupations (28%) and single-parent households (10%). Almost all parents in our study (94%) indicated their children were at home either full-time (88%) or part-time (6%) as a consequence of the general closure of schools and childcare centres during the measurement period. The remaining 6% of children were not at home, and thus in emergency childcare/school.

Data analysis

We relied on two methods for data analysis: descriptive methods (percentages based on crosstabulations; tables reported in online appendices) and multivariate modelling (tables displayed). We used two types of multivariate modelling: multinomial logistic regression and linear probability modelling (LPM). We used multinomial logistic regression for the analysis of paid work dynamics, which include nominal outcomes (three or more unordered categories in the dependent variable). Multinomial logistic models estimate the effect of independent variables on the relative probability of being in one of the multiple categories of the dependent variable compared to the reference category, which is not possible using LPM [31, 32]. We reported results from the multinomial logistic regressions using the more easily interpretable odds ratios rather than logistic coefficients. We used LPM to analyse the division of childcare and household tasks, and the quality of life. LPM is a linear regression model on a binary dependent variable (0/1), which is generally preferable to logistic regression for binary outcomes as odds ratios cannot be interpreted as effect measures in mediation or interaction models in logistic regression [33, 34]. Odds ratios reflect unobserved heterogeneity which can make it difficult to compare across models. LPM yields unbiased and consistent estimates of a variable’s average effect on the chance that the outcome occurs. The b-coefficients in LPM can be interpreted as average marginal effects, holding all other measures constant at their means. Note that average marginal effects report the differences in percentage points.

Results

Paid work

Work location

Our results show that almost half (49%) of the working parents in the sample report working all (38%) or part (11%) of their hours from home due to the COVID-19 lockdown measures in April 2020 (see S2A Table). In our sample, a small share (5%) of working parents indicate they worked most of their hours from home prior to the lockdown, and continue to do so during the lockdown. In addition, substantial shares (42%) of Dutch parents continue to perform work tasks outside the home during the lockdown. A small group of respondents (7%) report being allowed to work from home but choosing not to do so. The remainder of the parents not working from home (35% of working parents) indicate they work on location because their work cannot be performed from home. Finally, 4% of parents indicate having a job but being at home without work due to the COVID-19 lockdown measures.

The descriptive analysis on work location shows no clear gender differences (see S2B Table). The multinomial logistic regressions confirm this finding (see Table 1). Work location is primarily associated with respondents’ employment in essential versus non-essential occupations. Compared to the reference category of working all hours from home due to COVID-19, respondents in essential occupations are 3.4 times more likely to work part of their hours from home, 8.9 times more likely to work in their normal workplace by choice, and 4.7 times more likely to work in their usual location due to the nature of their work. These effects are the same for mothers and fathers, as indicated by the non-significant interaction terms. Thus, while essential workers are disproportionately women, no additional gender effect is found. A notable exception is that fathers are three times more likely than mothers to work in their normal workplace by choice, compared to working all hours from home, although this effect is only marginally significant.

Table 1. Multinomial logistic regression model: Gender differences in work location (ref = working (almost) all hours from home).
Working partially from home At normal workplace by choice At normal workplace due to nature of the work
B S.E OR B S.E OR B S.E OR
Male 0.413 (0.403) 1.511 1.120* (0.587) 3.064 0.079 (0.304) 1.082
Essential occupation 1.235*** (0.409) 3.439 2.183*** (0.602) 8.870 1.545*** (0.313) 4.686
Male * essential occupation 0.288 (0.546) 1.333 -0.968 (0.748) 0.380 -0.035 (0.445) 0.965
Partner in essential occupation -0.291 (0.294) 0.747 0.006 (0.343) 1.006 -0.092 (0.234) 0.912
Age (centred) 0.011 (0.025) 1.011 0.025 (0.030) 1.025 0.014 (0.020) 1.014
Sector
Private sector (= ref)
(semi-) public sector -0.468 (0.332) 0.626 -1.433*** (0.456) 0.239 -0.891*** (0.280) 0.410
Sector unknown -0.472 (0.348) 0.624 -0.442 (0.393) 0.643 -0.321 (0.266) 0.725
Educational level
High -0.496 (0.623) 0.609 -0.896 (0.637) 0.408 -2.701*** (0.390) 0.067
Medium 0.560 (0.662) 1.750 0.097 (0.693) 1.102 -0.145 (0.413) 0.865
Low (= ref)
Number of children -0.055 (0.185) 0.947 0.293 (0.217) 1.340 0.110 (0.150) 1.117
School status of children
No children in school 0.401 (0.374) 1.493 -0.229 (0.507) 0.796 -0.054 (0.322) 0.947
Children in primary school (= ref)
Child(ren) in secondary school 0.142 (0.412) 1.153 -0.030 (0.473) 0.970 0.183 (0.319) 1.200
Child(ren) in primary and secondary school 0.536 (0.414) 1.709 -0.012 (0.478) 0.988 0.299 (0.328) 1.349
Intercept -1.510 (0.774) -2.572 (0.921) 0.843 (0.520)
Cox & Snell R2 0.332
-2LL (df) 1290.189 (39)
N 675

* p<0.10

**p<0.05

***p<0.01

Variation in work location reflects differences in educational background. Highly educated parents are substantially more likely to relocate their work to the home: 54% work entirely from home and 13% perform at least some of their work from home. In contrast, 65% of low educated workers report working in their usual location because of the nature of their job; 59% of workers with a post-secondary vocational degree do so as well (see S2C Table). Specifically, parents with tertiary education are 93.3% less likely than their low educated peers to work in their normal location because their work cannot be performed from home compared to working all hours from home.

Working time adaptations

Almost two-fifths (38%) of Dutch parents report working less or much less on their normal workdays during the lockdown compared to the situation prior to COVID-19 (see S3A Table). Substantial shares of parents work more or much more in the evenings (40%) or during weekends (31%). Mothers are more likely to adapt their working times: While 49% of fathers report adapting the days on which they normally work during the lockdown, compared to prior to the COVID-19 pandemic, 61% of mothers adapt theirs: 41% percent of mothers work (much) less on their normal workdays and 20% report working (much) more on these days compared to the situation before the COVID-19 pandemic. For Dutch fathers, these percentages are 35% and 14% respectively. Mothers are more likely than fathers (48% versus 31%) to work (much) more on days they would normally have off.

Multinomial logistic regressions show that employment in an essential versus non-essential occupation moderates these gendered work dynamics. As Table 2 shows, fathers are 56% less likely to work (much) less on their normal workdays and 44% less likely to work (much) more on their normal workdays. Fathers’ lower relative probability of working less often on normal working days does not apply to those in essential occupations, as evidenced by the positive interaction term. Mothers in essential occupations are also less likely to reduce working on normal working days. The reduction in work on normal workdays is particularly prevalent among mothers employed in non-essential occupations. Fathers’ greater tendency to work at normal times is mirrored in their lower relative probability of increasing or decreasing work on normal days off (except for fathers in essential occupations). Net of gender, highly educated parents also experience more changes to the times at which they work (Table 2). Compared to low educated parents, highly educated parents are 3.2 times more likely to reduce and 3.6 times more likely to increase work on their normal workdays. The multinomial logistic regressions for additional adaptations in working times (i.e., working on normal days off, working during evenings and weekends) can be found in S3B-S3D Table.

Table 2. Multinomial logistic regression model: Adaptations in working times (ref. = no change to amount of work on normal workdays).
Work on normal workdays
Less More
B S.E OR B S.E OR
Male -0.849*** (0.253) 0.428 -0.589* (0.356) 0.555
Essential occupation -0.720*** (0.266) 0.487 0.459 (0.338) 1.583
Male * essential occupation 0.890** (0.376) 2.435 0.235 (0.477) 1.265
Partner in essential occupation 0.037 (0.198) 1.038 -0.377 (0.258) 0.686
Age (centred) -0.024 (0.018) 0.976 0.017 (0.022) 1.017
Sector
Private sector (= ref)
(semi-) public sector 0.162 (0.241) 1.176 0.122 (0.285) 1.130
Sector unknown 0.330 (0.218) 1.391 -0.203 (0.295) 0.817
Educational level
High 1.157*** (0.327) 3.179 1.287*** (0.449) 3.623
Medium -0.118 (0.352) 0.889 0.688 (0.464) 1.989
Low (= ref)
Number of children 0.010 (0.128) 1.010 -0.041 (0.160) 0.960
School status of children
No children in school -0.161 (0.270) 0.851 -0.161 (0.367) 0.851
Children in primary school (= ref)
Child(ren) in secondary school -0.192 (0.276) 0.825 0.164 (0.335) 1.178
Child(ren) in primary school and secondary school -0.639** (0.287) 0.528 -0.557 (0.371) 0.573
Intercept -0.215 (0.449) -1.666 (0.596)
Cox & Snell R2 0.153
-2LL (df) 1251.600 (26)
N 684

* p<0.10

**p<0.05

***p<0.01

Work pressure

The results demonstrate that the lockdown led to an increase in work pressure for one-third (36%) of Dutch parents; these parents report experiencing more work pressure in April than prior to the lockdown (see S4 Table). Perceived changes in work pressure differ significantly among mothers and fathers, both in terms of who experiences an increase and who experiences a decrease in work pressure. Mothers are significantly more likely than fathers to experience both more work pressure (39% versus 31%) as well as less work pressure (25% versus 19%) during the lockdown than before.

Amongst our covariates, essential occupation matters for perceived work pressure (see Table 3). Parents in an essential occupation are 2.6 times more likely to report increased work pressure during the lockdown, compared to parents not working in an essential occupation. We also find that educational level matters in relation to work pressure. Higher educated parents are more likely to experience changes in work pressure than lower educated parents, with an increased likelihood of experiencing less work pressure as well as more work pressure during the lockdown compared to before.

Table 3. Multinomial logistic regression model: Changes in work pressure (ref. = same amount of work pressure as prior to the lockdown).
Less work pressure More work pressure
B S.E OR B S.E OR
Male -0.630** (0.214) 0.533 -0.356* (0.190) 0.700
Essential occupation 0.047 (0.222) 1.048 0.965*** (0.196) 2.624
Partner in essential occupation 0.028 (0.222) 1.028 -0.042 (0.196) 0.959
Age (centred) -0.001 (0.020) 0.999 -0.012 (0.017) 0.988
Sector
Private sector (= ref)
(semi-) public sector -0.123 (0.266) 0.884 -0.244 (0.232) 0.784
Sector unknown 0.033 (0.242) 1.033 -0.209 (0.223) 0.811
Educational level
High 0.596* (0.349) 1.815 0.896*** (0.323) 2.450
Medium 0.293 (0.367) 1.340 0.456 (0.337) 1.578
Low (= ref)
Number of children -0.089 (0.140) 0.915 -0.114 (0.125) 0.893
School status of children
No children in school -0.196 (0.313) 0.822 0.147 (0.270) 1.158
Children in primary school (= ref)
Child(ren) in secondary school 0.014 (0.296) 1.014 0.051 (0.271) 1.052
Child(ren) in primary and secondary school -0.158 (0.324) 0.854 0.302 (0.278) 1.352
Intercept -0.529 (0.469) -0.869** (0.434)
Cox & Snell R2 0.082
-2LL (df) 1415.069 (24)
N 712

* p<0.10

**p<0.05

***p<0.01

The division of childcare and household work

Division of childcare

The results of the analysis on the division of childcare show an increase in care tasks for roughly one-fifth of parents: Compared to the situation before the lockdown, 17% of parents report doing a relatively higher share of care tasks during the lockdown (see S5A Table). This share is significantly higher among fathers (22%) than mothers (12%). We also find that a similar percentage of parents (about one-fifth) report doing less care tasks relative to their partner during the lockdown in comparison to the situation prior to the crisis. Here there are only negligible differences between mothers and fathers. While more fathers than mothers report an increase in the relative share of care tasks performed during the lockdown compared to the situation before, the overall division of childcare between mothers and fathers remains unequal. A majority of mothers (60%) reports doing (much) more childcare tasks than their partner during the lockdown (see S5B Table). In contrast, 10% of fathers report doing (much) more childcare tasks than their partner during the lockdown. One-third of parents (34%) reports that prior to the lockdown, childcare tasks were divided more or less equally; during the lockdown this remained about the same (35%).

Based on linear probability model analysis, the increase in fathers’ relative share of childcare work is significant (see Table 4). Compared to mothers, fathers have a greater chance (9 percentage points) of reporting an increase in the relative share of childcare tasks performed during the lockdown than before. Furthermore, changes in the division of childcare tasks are related to occupation. Parents who work in an essential occupation had a significantly smaller chance (13 percentage points) of doing more childcare tasks during the lockdown than before. The analysis of decreases in the relative shares of childcare tasks shows the opposite; parents working in essential occupations have a significantly greater chance (14 percentage points) of reporting a decreased relative share of childcare tasks during the lockdown in comparison to parents working in non-essential occupations. Having a partner in a non-essential occupation does not appear to influence whether respondents report doing more or less care tasks during the lockdown compared to before.

Table 4. Linear probability model: Changes in division of childcare tasks.
Increase in relative share of care tasks compared to before the lockdown Decrease in relative share of care tasks compared to before the lockdown
B S.E B S.E
Male 0.089*** (0.029) -0.042 (0.032)
Essential occupation -0.129*** (0.031) 0.138*** (0.034)
Partner in essential occupation 0.023 (0.030) -0.029 (0.033)
Age (centred) 0.001 (0.003) -0.004 (0.003)
Sector
Private (= ref)
(semi-)public sector 0.038 (0.037) -0.050 (0.040)
Sector unknown 0.060* (0.035) -0.021 (0.038)
Educational level
High 0.074 (0.048) -0.072 (0.052)
Medium 0.043 (0.050) -0.062 (0.055)
Low
Number of children -0.015 (0.020) 0.010 (0.022)
School status of children
No children in school -0.030** (0.041) -0.038 (0.045)
Children in primary school (= ref.)
Child(ren) in secondary school -0.106* (0.043) -0.053 (0.047)
Child(ren) in primary and secondary school -0.067 (0.044) -0.065 (0.048)
Intercept 0.167** (0.066) 0.266*** (0.073)
Adjusted R2 0.058 0.031
N 676

* p<0.10

**p<0.05

***p<0.01

Division of household tasks

A small proportion of parents (12% in total) report doing more in the household during the lockdown in comparison to before (see S6A Table). Fathers (17%) report this significantly more often than mothers (7%). A total of 13% of parents report doing less household work during the lockdown in comparison to before the lockdown, with only negligible differences between fathers and mothers. Two-thirds (65%) of all mothers reports doing (much) more household work than their partner during the lockdown (see S6B Table). Among fathers, only 10% indicated they did (much) more than their partner during the lockdown. Similar to the division of care tasks, roughly one third (32%) of parents indicates a more or less equal division of household tasks during the lockdown.

In the linear probability analysis, we find that the increase in fathers’ relative share is significant (see Table 5). While overall, mothers continue to do relatively more than fathers, fathers have a significantly greater chance (10 percentage points) than mothers of reporting an increase in their relative share of household work during the lockdown. Considering our control variables, occupation has a larger effect than gender, but only in relation to parents who report doing less housework during the lockdown than before. Parents who work in an essential occupation have a significantly higher chance (11 percentage points) of reporting doing a smaller relative share of housework during the lockdown. Similarly, respondents with a partner working in an essential occupation have a significantly smaller chance (11 percentage points) of reporting doing a smaller relative share of housework during the lockdown.

Table 5. Linear probability model: Changes in division of household tasks.
Does relatively more household tasks Does relatively less household tasks
B S.E B S.E
Male 0.100*** (0.026) -0.035 (0.028)
Essential occupation -0.026 (0.028) 0.111*** (0.029)
Partner in essential occupation 0.021 (0.027) -0.105*** (0.029)
Age (centred) 0.000 (0.002) -0.002 (0.003)
Sector
Private (= ref)
(semi)-public sector 0.010 (0.033) 0.041 (0.035)
Sector unknown 0.017 (0.031) 0.007 (0.033)
Educational level
High 0.067 (0.043) 0.003 (0.045)
Medium 0.057 (0.045) 0.013 (0.047)
Low (= ref)
Number of children -0.010 (0.018) -0.029 (0.019)
School status of children
No children in school 0.022 (0.037) 0.027 (0.039)
Children in primary school (= ref)
Child(ren) in secondary school -0.026 (0.038) 0.000 (0.040)
Child(ren) in primary and secondary school 0.041 (0.039) 0.010 (0.041)
Intercept 0.031 (0.060) 0.181** (0.063)
Adjusted R2 0.021 0.048
N 676

* p<0.10

**p<0.05

***p<0.01

Quality of life

Leisure time

The results show that almost half (48%) of parents reports having less leisure time during the lockdown than before (see S7 Table). More than half of the mothers (57%) indicates they have less leisure time than prior to the lockdown, in comparison to 36% of fathers. This effect remains significant in the linear probability model analysis (see Table 6). Table 6 shows that parents with an essential occupation face reduced leisure time more often than parents without an essential occupation. Having children in primary school is also a significant explanatory factor for differences in leisure time: Parents with primary school-aged children are significantly more likely to experience having less leisure time during the lockdown than before, in comparison to parents with children in secondary school.

Table 6. Linear probability model: Changes in leisure time (ref = no change in leisure time).
Less leisure time More leisure time
B S.E B S.E
Male -0.163*** (0.036) 0.092*** (0.031)
Essential occupation 0.100** (0.037) -0.011 (0.032)
Partner in essential occupation 0.038 (0.038) -0.004 (0.033)
Age (centred) -0.006* (0.003) 0.002 (0.003)
Sector
Private (= ref)
(semi-)public sector 0.021 (0.045) -0.047 (0.039)
Sector unknown -0.016 (0.042) -0.026 (0.036)
Educational level
High 0.241** (0.058) -0.013 (0.053)
Medium 0.144*** (0.061) 0.001 (0.051)
Low
Number of children 0.014 (0.024) 0.008 (0.021)
School status of children
No children at school -0.087* (0.051) 0.026 (0.044)
Children at primary school (= ref.)
Child(ren) at secondary school -0.289*** (0.051) 0.198*** (0.045)
Child(ren) at primary and secondary school -0.037 (0.053) 0.020 (0.047)
No work for me to do -0.030 (0.084) 0.341*** (0.072)
Intercept 0.381*** (0.080) 0.114 (0.070)
Adjusted R2 0.158 0.083
N 748

* p<0.10

**p<0.05

***p<0.01

Perceived work-life balance

Our analysis shows that the deterioration in work-life balance during the lockdown was equally pronounced among mothers and fathers. Few parents (11%) indicate they find it (somewhat to very) difficult to combine work and care before the lockdown (see S8 Table). During the lockdown, however, nearly one-third (29%) of parents perceives the combination of work and care to be somewhat to very difficult, an increase of 18 percentage points. Looking at changes in work-life balance, one-third (34%) of parents reports having greater difficulty combining work and care during the lockdown than before, and only a small group of parents (9%) perceives the current situation as favourable for their work-life balance (See S9 Table).

Once we control for our covariates, gender is insignificant. Rather than gender differences, educational level and the stage of schooling of children appear to explain variation in perceived work-life balance during the lockdown (see Table 7). Based on the average marginal effects, higher educated parents have a significantly greater chance (16 percentage points) to face increased difficulty combining paid work and care during the lockdown in comparison to parents with low (primary or secondary) education. This effect is even larger for parents with children of primary school age. Having primary school age children significantly increases the chance of experiencing difficulty combining work and care (by 28 percentage points).

Table 7. Linear probability model: Change in work-life balance.
Easier to combine work and care More difficult to combine work and care
B S.E B S.E
Male -0.032 (0.022) -0.034 (0.036)
Essential occupation -0.023 (0.023) 0.045 (0.037)
Partner in essential occupation -0.019 (0.024) 0.048 (0.037)
Age (centred) 0.000 (0.002) -0.002 (0.003)
Sector
Private (= ref)
(semi-)public sector 0.024 (0.028) -0.004 (0.044)
Sector unknown 0.063** (0.026) -0.021 (0.041)
Educational level
High 0.002 (0.036) 0.163*** (0.058)
Medium -0.009 (0.038) 0.079 (0.061)
Low
Number of children -0.016 (0.015) -0.001 (0.024)
School status of children
No children at school 0.003 (0.032) -0.068 (0.050)
Children at primary school (= ref.)
Child(ren) at secondary school 0.068** (0.032) -0.284*** (0.051)
Child(ren) at primary and secondary school 0.055* (0.033) -0.081 (0.053)
Intercept 0.105** (0.050) 0.324*** (0.079)
Adjusted R2 0.010 0.080
N 748

* p<0.10

**p<0.05

***p<0.01

Relationship dynamics

Our final measure of quality of life relates to relationship dynamics: The extent to which partners experience disagreements about the location of work, the division of care or household tasks, or the amount of leisure time. Most parents indicate that prior to the lockdown, they never had disagreements on most of these topics, including where they or their partner worked (working at the normal work location (79%); working from home (72%)), or the amount of leisure time (56%; see S10 Table). However, prior to the lockdown, about half of parents experienced monthly (or more frequent) disagreements about the division of care tasks (51%), and 60% quarrelled about household tasks. The lockdown did not change this situation for most parents. A majority of parents (between 62% and 71%, depending on the measure) reports no change in the prevalence of disagreements in all areas during the lockdown (the normal work location, working from home, caring for children, household chores, and leisure time; see S11 Table).

These relationship dynamics are the same for mothers and fathers, even after including the covariates in the linear probability model analysis. The only significant increase in disagreements is amongst a proportion of parents in relation to the division of childcare tasks. One-fifth of parents reports an increase in disagreements about the division of childcare tasks, with no differences related to gender (see Table 8). However, parents with children in primary school have a higher chance of reporting an increase in disagreements about the division of childcare tasks (13 percentage points) in comparison to parents with children in secondary school.

Table 8. Linear probability model: Change in disagreements about division of childcare.
Less disagreement about childcare tasks More disagreement about childcare tasks
B S.E B S.E
Male -0.024 (0.031) -0.021 (0.033)
Essential occupation 0.034 (0.032) 0.005 (0.035)
Partner in essential occupation -0.025 (0.032) 0.006 (0.034)
Age (centred) 0.002 (0.003) -0.009*** (0.003)
Sector
Private (= ref)
(semi-)public sector -0.080** (0.038) -0.043 (0.041)
Sector unknown -0.058 (0.036) 0.067* (0.038)
Educational level
High -0.169*** (0.050) 0.168*** (0.054)
Medium -0.138*** (0.053) 0.076 (0.057)
Low
Number of children -0.005 (0.020) -0.034 (0.022)
School status of children
No children at school 0.011 (0.043) -0.104** (0.046)
Children at primary school (= ref.)
Child(ren) at secondary school 0.007 (0.045) -0.128*** (0.048)
Child(ren) at primary and secondary school -0.024 (0.045) 0.003 (0.049)
Intercept 0.360*** (0.069) 0.220*** (0.074)
Adjusted R2 0.018 0.081
N 748

* p<0.10

**p<0.05

***p<0.01

Conclusion

Our results show that the Dutch ‘intelligent’ lockdown, intended to mitigate the health, social and economic impact of the COVID-19 pandemic, significantly impacts Dutch parents. Many parents are experiencing significant changes in paid work (including where and when they work, and subjective work pressure), the division of childcare and household tasks, and quality of life (the amount of leisure time, as well as the perceived ease or difficulty of combining work and care tasks and negotiating about these tasks with their partner during the lockdown). Our study indicates that the impact of the first COVID-19 lockdown measures on Dutch parents is gendered, whereby some existing gender inequalities increase. Below, we summarize our main results.

Paid work

Mothers adapt the times at which they work, more so than fathers. Mothers not in essential occupations adapt their working times even more, and are more likely to experience increased work pressure during the lockdown than fathers.

The division of care and household tasks

At home, the division of household and care tasks remains unequal. More mothers than fathers report doing relatively more housework and childcare tasks than their partner, before the lockdown as well as during the lockdown. We also find limited evidence of a reduction in gender inequality in the division of childcare and household tasks. While mothers continue to do more household and caregiving tasks than fathers, the gap decreased somewhat as fathers report doing (somewhat) more during the lockdown than before.

Quality of life

We do not find that mothers experience a more pronounced overall decline in the quality of life in comparison to fathers. Mothers as well as fathers equally experience a worsening of work-life balance and an increase in disagreements about the negotiation of the division of childcare tasks. However, leisure time, an important indicator of quality of life, decreased much more for mothers than for fathers during the lockdown.

Discussion

A key strength of the findings presented here is that they provide evidence of the impact of an unprecedented lockdown based on a representative, probability-based sample among Dutch parents with a high response rate, thereby adding much-needed evidence to an international trend which suggests inequalities along gender and class lines are worsening during the Covid-19 pandemic [9, 14, 1719]. The gender and educational inequalities (a proxy for class inequalities) exacerbated by or brought about by the lockdown measures are a cause for concern. While mothers’ greater adaptability need not be problematic in and of itself, the larger decrease in leisure time among mothers and the increased perception of work pressure among mothers in comparison to fathers, is. An initial study by Eurofound similarly suggests workers are sacrificing leisure to meet work demands during the pandemic [14]. Consequently, people with insufficient leisure time experience a poorer quality of life as well as a greater risk of reduced health and well-being [7]. Greater perceived work pressure and difficulty combining work and care can also have long-term negative effects. Employees who experience high stress, high work load and time constraints for a long period of time are less productive, are more likely to suffer from burnout complaints and are more likely to switch jobs compared to employees who are feeling well [3537]. This is especially true when employees have insufficient time to recover from work stress on a day-to-day basis [38]. High levels of perceived work pressure, both before and during the lockdown, among mothers and among workers in occupations considered to be essential for society can therefore be worrisome. Particularly as mothers also experience insufficient leisure time, which can be a sign of insufficient recovery time. These concerns are even greater when considered in relation to growing staff shortages in some of the occupational groups where mothers are overrepresented (e.g., care and education).

Meanwhile, although the lockdown measures result in an increase in gender inequality in paid work and some aspects of quality of life in the Netherlands, our study, in line with results from the US [19], suggests some decrease in gender inequality is also occurring. While mothers still do the lion’s share of caregiving and household tasks, the increased involvement of fathers in these tasks during the lockdown offers an opportunity and potential catalyst for further erosion of traditional role patterns in the division of household and care tasks. Prior to the lockdown, Dutch couples routinely reported wanting an equal division of work and care, yet fathers remained more likely to participate in full-time paid employment, whereas mothers were more likely to combine a part-time job with taking on a higher caregiving burden [27].

It should be noted that, overall, women appear to be impacted more by job losses resulting from the COVID-19 pandemic in several countries, including the Netherlands [39], as well as in the US, the UK, and Australia. The latter three countries have historically less generous social policies in place to mitigate the consequences of being out of work [17, 18]. Such variation in policy schemes available to support the temporary furloughing of employees may help explain the different effects of lockdown measures in the long run [17, 22]. With or without government support, women are overrepresented in several sectors hardest hit by the lockdown (retail, accommodation services, and food and beverage service activities) and it is expected that these effects will be felt far into the future, further affecting gender inequality [40].

Alongside the gender differences we explore here, our study also raises questions about the effects of working in an essential occupation as well as working from home, especially with regard to quality of life. We find that parents working in an essential occupation experience the highest levels of work pressure during the lockdown, which can result in health-related risks, such as burnout. These workers are also less likely to work from home. Workers in essential occupations, more often mothers than fathers, and the lower educated, largely continue to perform work in their usual workplace. As a result, these workers face larger risks of exposure to the COVID-19 virus, especially if they work in care occupations, use public transport to get to work, or interact closely with colleagues.

Meanwhile, our study also indicates that working from home is reserved primarily for highly educated parents working in public sector, non-essential occupations (i.e. ‘knowledge workers’). These parents face potentially larger risks related to the blurring of work and family time, as evidenced by their greater tendency to deviate from their normal workdays and times. Based on our findings, we can speculate about what this might imply for gender inequality. On the one hand, it could be that more opportunities to work from home (and increased flexibility in working hours) will enable mothers to increase their participation in paid work. On the other hand, unfavourable side effects can be expected when we consider our finding that fathers more often choose to go to the workplace during a lockdown situation even when they could work from home, whereas mothers more often work from home. In the long run, such differences may result in increased gender inequality, with mothers possibly becoming ‘online’ workers, with potentially fewer career and networking opportunities, and a greater blurring of work and family life. Although working from home can be advantageous to some workers, employers need to anticipate and monitor for potential unfavourable side effects.

Limitations

We note a number of limitations of our study, primarily related to data availability. Our findings are based on a single country cross-sectional survey design in which we asked respondents to compare their current situation with their situation before the lockdown using self-rated response measures. Cross-sectional data allow for a snapshot of a unique situation, yet longitudinal data are needed to disentangle causal effects and the long-term impact of the pandemic on the unequal division of tasks and/or resources between men and women. Currently, we are collecting additional multi-wave data to investigate the long-term effects of the COVID-19 pandemic on work and family dynamics. A further limitation of our study stems from the absence of data on the age of the youngest child. Consequently, we are unable to distinguish between children not yet of school age and children who have already completed secondary schooling. The distinction made here based on the phase of schooling addresses this issue only partially. Another limitation is the absence of data on the outsourcing of household or childcare tasks. However, it is reasonable to expect that external help would not have a large confounding impact on the results presented here, as outsourcing of such tasks is generally low in the Netherlands [41].

Future research

The additional evidence base provided by our study offers several avenues for future research. Given the long-term nature of the pandemic, and the continual increase and decrease of measures to counter COVID-19 across countries, future research must consider the long-term effects of such measures. More intensive forms of working from home have been introduced in many countries as a result of the pandemic. Studies need to consider the potential varying effects of (not) working from home for mothers and fathers, especially with regard to their health and quality of life. In particular, the future world of work is expected to enable greater accessibility of working from home.

In the Netherlands and in other countries, whether temporary lockdown measures lead to sustained increases or decreases in the unequal division of childcare and household tasks evident prior to the pandemic remains an important point for research. Within this line of scholarship, attention should focus on the age of children, particularly in order to distinguish the pressure of care tasks for children younger than school age versus children living at home, but no longer attending school. In addition, data on working hours would be useful, particularly in the Dutch case where part-time work is the norm; mothers working part-time might be the ones adapting their work situation more than full-time working mothers. Research on how parents experience the changes in the division of childcare and household work is also needed. Do fathers who take on greater childcare or household tasks enjoy these new roles? Do mothers like these new divisions, or do feelings of discontent arise? Questions such as these become crucial for understanding the potential long-term sustainability of such changes to gender equality patterns.

In addition, while the closure of schools and childcare centres led to greater attention to the needs of parents and families, additional research should consider the societal impact on all workers affected by the lockdown measures. For example, the class effects found here extend beyond parents. Workers on temporary contracts and the self-employed face significant work and income insecurity [14, 17]. Workers in essential occupations experience significant work pressure. Moreover, the impact of lockdown measures can differ across individuals, for example age cohorts. While social distancing requirements cause social networks to fall away for almost everyone, young people experience much higher levels of loneliness during the lockdown than other age cohorts [14]. Additional research could also go beyond the gender binary still common in many datasets, to allow for greater diversity in our understanding of gender inequalities.

General conclusion

Current developments necessitate the consideration of new (temporary) lockdown measures to curb the COVID-19 pandemic. Clearly, the societal impact of such measures is great. Our study suggests that in potential future lockdowns, policy and research attention should be paid to gender and class differences in the impact of these measures. Attention is needed to mitigate the adverse ‘unintelligent’ impact of lockdown measures on the health and wellbeing of parents, especially among mothers. For example, should schools need to be closed during future lockdowns, greater support for parents, and more independent assignments for (younger) children may help to mitigate the pressure parents feel when negotiating care tasks with their partner and combining home schooling with work responsibilities. While scientific and policy attention is logically focused on the health risks associated with the COVID-19 virus, the societal implications of attempts to stop its spread must not be forgotten.

Supporting information

S1 Table

A. Descriptive statistics. B. Linear Probability model: Essential occupation.

(DOCX)

S2 Table

A. Distribution of employed respondents by work location. B. Distribution of employed respondents by work location and gender. C. Distribution of employed respondents by work location and educational background.

(DOCX)

S3 Table

A. Working time adaptations by gender. B. Multinomial logistic regression of shifts in working time (ref. = no change to amount of work on normal days off). C. Multinomial logistic regression of shifts in working time (ref. = no change to amount of work in the evenings). D. Multinomial logistic regression of shifts in working time (ref. = no change to amount of work on the weekend).

(DOCX)

S4 Table. Perceived work pressure by gender.

(DOCX)

S5 Table

A. Changes in relative share of care tasks. B. Division of care work by gender.

(DOCX)

S6 Table

A. Changes in relative share of household tasks by gender. B. Division of household work by gender.

(DOCX)

S7 Table. Change in leisure time by gender.

(DOCX)

S8 Table. Ease or difficulty of combining work and care before and during the lockdown.

(DOCX)

S9 Table. Changes in work-life balance.

(DOCX)

S10 Table. Never had disagreements with partner on these issues.

(DOCX)

S11 Table. No change in disagreements with partner on these issues.

(DOCX)

S1 File

(DOCX)

Acknowledgments

We are grateful to Paul de Beer (University of Amsterdam) for his contribution to the initial study and to Joost Leenen of CentERdata (Tilburg University, The Netherlands) for programming the survey.

Data Availability

The data underlying the results presented in the study are available from the LISS archive (www.dataarchive.lissdata.nl). DOI: 10.17026/dans-x3d-e4fb

Funding Statement

Research material for the Covid19 Gender (In)equality Survey Netherlands (COGIS-NL) study was supported by an ODISSEI (Open Data Infrastructure for Social Science and Economic Innovations) grant (ODISSEI, No award number, Dr. Mara A. Yerkes) to collect data during the COVID-19 pandemic. All authors listed on the paper were recipients of the grant (MY, SA, DB, JB, PK, CR, RvdZ, SG). The grant allowed for the collection of data within the existing LISS panel (the Dutch Longitudinal Internet Studies for the Social Sciences). The LISS panel data (including the COGIS-NL data) are collected by CentERdata (Tilburg University, The Netherlands) through its MESS project funded by the Netherlands Organization for Scientific Research. The authors do not receive funding from either CentERdata or the Netherlands Organization for Scientific Research for the purposes of this study. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. CentERdata provided advice regarding study design for the purposes of survey programming; final decisions on study design were the responsibility of the authors. CentERdata had no role in the data analysis, decision to publish, or preparation of the manuscript.

References

Decision Letter 0

Srinivas Goli

11 Sep 2020

PONE-D-20-22569

Intelligent lockdown, intelligent effects? The impact of the Dutch COVID-19 ‘intelligent lockdown’ on gendered work and family dynamics among parents

PLOS ONE

Dear Dr. Yerkes,

Thank you for submitting your manuscript to PLOS ONE. After careful consideration, we feel that it has merit but does not fully meet PLOS ONE’s publication criteria as it currently stands. Therefore, we invite you to submit a revised version of the manuscript that addresses the points raised during the review process.

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ACADEMIC EDITOR: Both the reviewers find a merit in the research question addressed by this paper. I suggest authors to revise the paper according some major comments given by both the reviewers. Apart from the reviewers comments, I advise the authors to improve the flow and readability of the text. Add a limitation section to the study in ordered to address some of the comments of reviewer 1. 

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[The descriptive results in this manuscript have been published as part of a policy brief (in Dutch). ]

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Additional Editor Comments (if provided):

I suggest authors to revise the paper according some major comments given by both reviewers. Apart from the reviewers comments, I advise the authors to improve the flow and readability of the text. Add a limitation section to the study in ordered to address some of the comments of reviewer 1.

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Reviewers' comments:

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Comments to the Author

1. Is the manuscript technically sound, and do the data support the conclusions?

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Reviewer #1: Partly

Reviewer #2: Partly

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2. Has the statistical analysis been performed appropriately and rigorously?

Reviewer #1: No

Reviewer #2: I Don't Know

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Reviewer #1: Yes

Reviewer #2: Yes

**********

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Reviewer #2: Yes

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Reviewer #1: Attached as a separate comment document, it explains why the data needs to be relooked as there is a confounder which has a huge potential effect on the outcome of the regression analysis. so authors needs to undertake that additional analysis and explain

Reviewer #2: Manuscript PONE-D-20-22569

General comments

The manuscript claims to explore the impact of the COVID-19 pandemic on gender inequality in work dynamics, family dynamics and quality of life in the Dutch context. It uses an explorative, longitudinal study design and collects both independent and dependant data from a panel. A questionnaire was developed and tested. The included sample consisted of 852 participants. The presented data and results are the first of four waves of longitudinal data.

The strength of the study is that it adds to our understanding of the impact of the COVID-19 pandemic on societal effects, in this study gender inequality. It is indeed an important topic, in light of recent developments worldwide. Particularly, it gives insight in the impact of the pandemic in the Dutch situation. What I like about it is that it emphasizes a very ‘clinically’ relevant subject which is probably recognisable for many people.

While the study appears to be sound, the terminology, methodology and flow is often somewhat unclear, making it difficult to follow. I advise the authors to improve the flow and readability of the text. The major and minor issues are meant to help to make improvements.

Major issues

Grammar

The authors sometimes report in the past tense and sometimes in the present tense. This creates confusion throughout the text. I suggest the authors make improvements.

Title

To bring more focus, it would help to mention the design at the end of the title.

Abstract

The content of the abstract seems not fully summarize the main text. For example, it is difficult to find out where the results are reported and what the final conclusion of the study is. Also, a main limitation was not mentioned.

Introduction

Gender inequality is the main topic of the study, but the authors did not introduce the subject. Also, terminology is often not or not clearly defined. Furthermore, I miss a rationale for a longitudinal study. The final problem here is that the purpose of the study and the objectives (did you have three objectives related to the themes? Or more?) remain unclear.

Method

It remains unclear what type of design was used. I understand that an exploratory, longitudinal study was mentioned in the introduction, but it would be helpful if the authors would start the method section mentioning the design and giving an overview of the design.

Ethical considerations

It is problematic that there is no paragraph concerning “Ethical considerations”. I would suggest the authors to add this paragraph in the method section, after the paragraph/sample.

Intervention

Furthermore, I understand that the authors did not conduct a study using a specific intervention themselves. Nevertheless, “the lockdown measures” may be seen as an intervention. I think it would be helpful if the authors would give a clearer picture of the lockdown intervention of the Dutch government. It might work to do this in the introduction section. I am confused about the questionnaire and the measures. Did the authors develop one questionnaire with multiple measures? It would be helpful if the authors give a clearer description of the applied questionnaire.

Data-analysis

Also, I found it somewhat confusing to find out how data was analysed. I understand there were three main themes (dependent variables) and also independent variables. But how were these analysed? Could the authors help the reader to improve readability here? For example, is it possible to start sentences like, “To analyse… data… we used …”?

Results

Due to the writing style in the results section, it seems that the authors mixed up results and conclusions. The headings and subheadings seem somewhat suggestive and cause confusion about the reported topics. I guess it will help the reader if the authors stay closer to the themes and topics of data-collection and not use question marks.

Discussion and conclusion

The structure and order of this section is somewhat unclear. Again, the summary of the results and conclusions seem to be mixed up or at least it remains unclear what the results are and what the conclusions. Furthermore, it was unclear where and how each result was compared with results from other studies. Finally, I missed a general conclusion.

Minor issues

I have listed my comments in the order of the issues’ appearance in the manuscript.

Title

The title seems not fully in line with the collected data. Particularly the “gendered work” and “family dynamics” seem different. In the main text I found out it was about “paid work dynamics” and “dynamics at home”. Also, I seem to miss quality of life here.

Abstract

Page 1, Line 2 .“This study examines …” seems incomplete. May it also be that the sentence is redundant? I would expect the relevance of the study first.

Line 8. “The question arises to what extent …” seems inappropriate and confusing, because it is not the research question. Could the authors be more specific what they mean here?

Line 9. The design is missing here.

Line 10. “paid work, division of care and household work and quality of life seem not in line with the description in the main text.

Line 11. The specification of quality of life seems redundant here.

Line 12. it would be helpful to split the sentence and describe the analysis method and results separately. Please start a sentence with “Results showed…”

Line 13: It would be appropriate to report a final conclusion here and then refer to the longitudinal study / or further study…

Introduction

Pg 2. Line 27. Since gender inequality is the main subject of the study, authors are recommended to define and operationalize the concept.

Pg 3. Line 57. To start a new paragraph with a question, i.e. “How do the sudden changes …”, does not invite to read on. I would suggest the authors to rewrite the sentence.

Line 74 “For a thorough understanding of … other countries, …” Compared to what countries? US? Please be specific here.

Pg 5. Line 114. I do not understand the relevance of the sentence “Against this backdrop, …”. Please explain in text or maybe delete the sentence?

Line 119. This is the first time that the authors mention the design (exploratory study). To improve readability, it will help if the authors define and give a rationale for an exploratory study here (see also major issues). Also, I think the authors conducted a longitudinal study? I would recommend to add this here.

Line 120. The text “we aim to provide …” in combination with the text in line 122 “We aim to answer the question confuses me. I suggest to describe and distinguish purpose and objectives here. Also, the text in line 123 “… increase or decrease gender inequality in work and family dynamics” seems incomplete compared to the three main themes mentioned in the method section. Please revise the text, to bring the content in line with the method section.

Line 125-126. Again, this list seems not in line with the method section. Please rewrite.

Line 127. The text between brackets seems redundant here. It would be helpful if the authors define the quality of life earlier in the text.

Materials and methods

The order and content of this section confuses me. Below some suggestions.

Pg 6. Line 132. It would help to start with a heading/Method, followed by a subheading “Design” and give an overview of the design here.

Line 135. It seems there is some duplication here. The sample is also explained below. I suggest that the authors delete the description of the sample here.

Line 142. The authors use the term “sample frame” here. In line 145 the authors describe that 16 respondents were excluded. This may suggest that the researchers used inclusion criteria. This seems a bit confusing. If so, I would recommend the authors to be consistent and use the concepts of the “inclusion and exclusion”.

Line 143. “This resulted in” … meaning “a selection of … were included”? Please be consistent here as well.

Line 145. It would be helpful if the authors would add the numbers and specific reasons why these 16 respondents were excluded.

Pg 7. Line 151. The heading “Measures” confuses me. Did the authors use multiple measures? Also, I do not understand why the authors chose not to describe the questionnaire here. I would recommend the authors to describe the questionnaire if possible. I think it would be more appropriate to add the first sentences of the following paragraph (dependent variables) “We explore three themes ….reported by one respondent” to the “Measures” paragraph.

Line 164.

If possible, I suggest it would help the readers if the authors would add another subheading here, i.e. “paid work dynamics” and add subheadings for the other three themes too.

Line 165. To improve readability, it would help if the authors would start this paragraph and sentence with "To explore the impact on paid work dynamics ..." and bring the other themes/dependent variables in line with this.

Line 171. The word “analyses” seems confusing in this context. Please reformulate.

Pg 8. Line 174. I suggest to add a subheading “dynamics at home” and use “to explore”.

Line 175. “ We used relative measures…”. I find this confusing, possibly because the developed questionnaire (which was mentioned before) was not clearly described. I would suggest to make changes to improve understanding.

Line 178. Also, quality of life was a theme and needs a subheading (I think) to improve readability.

Line 181. I understand the Likert-scale. Nevertheless, it would be helpful to describe “what number is good (1) and what is bad (2)” and do the same for the other Likert-scales.

Line 187. The word “Lastly" seems confusing here, suggesting it was a theme. Please rewrite.

Line 192. “We are primarily interested in exploring gender differences”. This sentence seems particularly relevant. I would suggest the authors it should be part of the design paragraph.

Line 193. I found it interesting that the authors used a binary variable. How about gender neutrality and gender diversity ? This may be relevant to mention somewhere in the text/intro/discussion?

Line 194. I guess the word “self-assessment” is redundant here, as it was mentioned before.

Pg 9. Line 207. “Dutch mothers were overrepresented …”. I do not understand the relevance of this sentence here. Would it be more appropriate to add this to the discussion section?

Pg 10. I do not understand why the authors use the heading “Methods” here as it was partly used before. Did the authors mean analyses? That would be more in line with the text. I would like to ask the authors to make improvements here to strengthen the flow of the text. Also, I would suggest to follow the three aforementioned themes in this section, if possible, and describe how each theme was analysed or to be more specific what type of analysis belongs to what. For example, the authors may use sentences like: “To analyse…., … was used”.

Pg 11. Line 250-252. This text seems more a conclusion than a result. I suggest the authors to check and delete these type of texts throughout the results section.

Line 254. The heading seems not appropriate as it is too long and too little in line with the three main themes. I would recommend the authors to follow the main themes for each subheading, use the word “paid work dynamics” here and make further changes for the other subheadings too in the result section, in line with the main themes and topics.

Line 256. It seems strange to start a sentence with a reference in a results section. It feels as if the results are mixed up with the discussion here. Please rewrite.

Line 260, The line “However, it would be misleading…” seems suggestive. Please rewrite.

Pg 12. Line 285-288. Another example where the text seems more a discussion than a presentation of the results. Possibly it is due to the writing style. Again, I would like to ask the authors to check writing style and present the results close to the results of the analyses.

Pg 15. Line 305. As I reader, I realize that the authors studied data concerning the situation before and during the pandemic. Is that right? Then, I guess it would be helpful if the authors improve writing style.

Line 311. The authors mention the type of analysis here, but this was not consistently done throughout the section. I would recommend the authors more consistency in writing.

Pg 17. Line 334. I think that a subheading “Work pressure” would be more appropriate here.

Pg 18. Line 346. The authors mention “other analyses”, what do the authors mean here?

Pg 25. Line 432. “… having less leisure time’. Compared to what? Also, “This decline in leisure time is significantly gendered”. This seems a conclusion.

Pg 28. Line 476. The authors report on “free time here”. I am confused. What is the difference between leisure time and free time?

Discussion and conclusion

Pg. 30. Line 500. Is this where the summary of the results starts? I am confused (see major issues). I would recommend the authors to be more specific about the main results here. The authors could or should consider to follow the main themes of the study.

Line 520. I have some mixed feelings about the sentence “The changes…. For optimism”. Especially the word “optimism” seems confusing here. This may be, because it is not clear to me whether this is still a result or a conclusion. I suggest that the authors rewrite this sentence.

Line 526. I do not understand the relevance or purpose of the question. Please rewrite this sentence to improve the flow of the text. Maybe this question is relevant as an implication in the discussion section?

Pg 32. I am not sure where in the discussion section the authors compared their results with the results of other studies. I recommend the authors to reconsider this matter and rewrite the discussion somewhat so readers can understand the results in a broader context.

Line 576. Future research and limitations seem to be mingled. Please rewrite.

Line 587. The authors discuss the strengths of the study here. I would suggest to mention these earlier in the discussion section before the limitations.

Pg 35. Line 601. “Studies such as ours demonstrate…”. Since it was an exploratory study, I would suggest the authors to formulate be a little more careful here”.

Line 611. I guess the following part of the text are concluding words. I miss a general conclusion, also in line with the purpose of the study.

Final thoughts

I can imagine that the number of comments is somewhat disappointing. I hope the authors can appreciate this as a way to show that the study is an important contributor to the impact of the COVID-19 pandemic and that the comments are intended to make the manuscript easier to read.

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Reviewer #1: No

Reviewer #2: No

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Attachment

Submitted filename: PONE-D-20-22569_reviewer.pdf

Attachment

Submitted filename: Reviewer comment 15082020.pdf

PLoS One. 2020 Nov 30;15(11):e0242249. doi: 10.1371/journal.pone.0242249.r002

Author response to Decision Letter 0


26 Oct 2020

Revisions to PONE-D-20-22569

1. Please ensure that your manuscript meets PLOS ONE's style requirements, including those for file naming. The PLOS ONE style templates can be found at

https://journals.plos.org/plosone/s/file?id=wjVg/PLOSOne_formatting_sample_main_body.pdf and

https://journals.plos.org/plosone/s/file?id=ba62/PLOSOne_formatting_sample_title_authors_affiliations.pdf

We have carefully edited the manuscript to ensure it follows all style requirements. This includes a check of all headings, and removing the short title from the title page. We also now first mention the asterisk followed by the pilcrow symbol.

2. Please ensure that you include a title page within your main document. We do appreciate that you have a title page document uploaded as a separate file, however, as per our author guidelines (http://journals.plos.org/plosone/s/submission-guidelines#loc-title-page) we do require this to be part of the manuscript file itself and not uploaded separately.

Could you therefore please include the title page into the beginning of your manuscript file itself, listing all authors and affiliations.

A title page has been added.

3.Thank you for including your ethics statement: "The work presented here has been approved by the Faculty Ethics Review Committee, Faculty of Social and Behavioural Sciences, Utrecht University. Approval number: 20-269.".

Please provide additional details regarding participant consent. In the ethics statement in the Methods and online submission information, please ensure that you have specified (1) whether consent was informed and (2) what type you obtained (for instance, written or verbal, and if verbal, how it was documented and witnessed). If your study included minors, state whether you obtained consent from parents or guardians. If the need for consent was waived by the ethics committee, please include this information.

If you are reporting a retrospective study of medical records or archived samples, please ensure that you have discussed whether all data were fully anonymized before you accessed them and/or whether the IRB or ethics committee waived the requirement for informed consent. If patients provided informed written consent to have data from their medical records used in research, please include this information.

Once you have amended this/these statement(s) in the Methods section of the manuscript, please add the same text to the “Ethics Statement” field of the submission form (via “Edit Submission”).

For additional information about PLOS ONE ethical requirements for human subjects research, please refer to http://journals.plos.org/plosone/s/submission-guidelines#loc-human-subjects-research.

This information has now been included in the ethics statement and amended in the Methods section of the manuscript.

4.We noted in your submission details that a portion of your manuscript may have been presented or published elsewhere.

[The descriptive results in this manuscript have been published as part of a policy brief (in Dutch). ]

Please clarify whether this [conference proceeding or publication] was peer-reviewed and formally published. If this work was previously peer-reviewed and published, in the cover letter please provide the reason that this work does not constitute dual publication and should be included in the current manuscript.

The descriptive results (no multivariate analyses) were not formally published but presented in a short “policy brief” in the Dutch language, on the website of Utrecht University. This policy brief was not peer reviewed. Hence, the work submitted to PlosOne does not constitute a dual publication. We note that following submission to PlosOne, we have published a pre-print of the paper on the Social Sciences archive SocArXiv, in line with the guidelines of the journal.

5.We note that you have stated that you will provide repository information for your data at acceptance. Should your manuscript be accepted for publication, we will hold it until you provide the relevant accession numbers or DOIs necessary to access your data. If you wish to make changes to your Data Availability statement, please describe these changes in your cover letter and we will update your Data Availability statement to reflect the information you provide.

The data are published and accessible to the research community after a moratorium of six months. The data used in the paper will become available in November 2020. Should our manuscript be accepted for publication, the data will be available by this time. We will provide the DOIs on the first possible occasion once they are provided to us.

Additional Editor Comments (if provided):

I suggest authors to revise the paper according some major comments given by both reviewers. Apart from the reviewers comments, I advise the authors to improve the flow and readability of the text. Add a limitation section to the study in ordered to address some of the comments of reviewer 1.

We are pleased to read that both reviewers see merit in the manuscript and that it adds to our understanding of the impact of the COVID-19 pandemic on society. We appreciate the helpful comments provided by the reviewers on our manuscript and this document outlines the changes we have made to incorporate these comments. This includes the addition of a limitation section. We hope the changes outlined here adequately address the concerns of the editor and the reviewers, contributing to a significant improvement of the manuscript.

Note that to maintain readability of the manuscript, we have not used track changes to show deletions of text, but only to indicate which parts of the manuscript are new/rewritten.

Reviewer 1

Reviewer 1 expressed the concern that we have potentially overlooked a major confounding variable measuring “alternative care personal in the family, as this will affect both individual as well as relationship with partner and until multivariate regression looks into this the causality cannot be established.”

In addition, Reviewer 1 notes in line 173 of the manuscript: “having an alternative care giver in the family is a strong dependent variable, neither in sample of variable description it is highlighted, it is important to clarify that, whether in the sample they were excluded and if not their effect needs to needs to be studied as it is a very crucial confounder and without clarification the robustness of regressions can be questioned”.

In the email, Reviewer 1 states: “Attached as a separate comment document, it explains why the data needs to be relooked as there is a confounder which has a huge potential effect on the outcome of the regression analysis. So authors needs to undertake that additional analysis and explain.”

We thank the reviewer for their careful interpretation of the analyses. In response to the point raised by the reviewer, we note two things. First, we work with cross-sectional data, therefore it is not possible to establish causality. We do not attempt to do this in the current manuscript, but rather focus on the relationships established through multivariate analysis. We therefore apologise for any causal language used and have read through the manuscript and adjusted this were necessary.

Second, it is not entirely clear to us what is meant with “alternative care personal in the family”. Is the reviewer referring to alternative persons who can also provide caregiving, living within the household? Or to other persons who might also need care within the household?

In the case of the former interpretation, it is uncommon in the Netherlands for multiple generations to live in one household. Hence, the presence of a personal caregiver other than parents (within one household) is extremely rare in the Netherlands. Less than 1% of all households is multigenerational (including children and grandparents) according to data from the EU-SILC (2008). Further, as we state in the manuscript: “Given social distancing requirements, grandparents were discouraged from helping to provide alternative sources of care during the lockdown”. Also, paid personnel in private households in the Netherlands primarily consists of people hired for elderly care or as cleaning staff rather than for childcare, and such help is almost always hired on a part-time basis. Data from 2014 indicate that only 2.3% of the Dutch population either hired nannies or engaged subsidized personalized childcare services (as opposed to institutionalized (formal) services), the latter of which were closed during the first wave of the pandemic. Of the people who rely on domestic childcare services, 53% did so at most once every two weeks. (Bouwens et al. 2014).

In the case of the latter interpretation, whereby parents may conceivably have informal care duties alongside childcare, the percentage of individuals who have both children and other caregiving responsibilities is low in the Netherlands. Although one in three Dutch people provides informal care, providing more than 8 hours of care a day is limited to 5% of the population. In addition, having young children is a factor that causes people to provide less informal care (SCP, 2014).

For either interpretation, it is reasonable to expect that alternative care (either being provided by or providing for others) would not have a large confounding impact on the results we are looking at. In other words, while our questionnaire did not include items on paid domestic services, the effects are likely to be limited. Moreover, the presence of childcare personnel in the household, most likely in the shape of a part-time nanny, would be expected to affect the household as a whole, affecting both parents. It, therefore, would not explain the gender differences found in the study. We now include a brief statement on the point raised by the reviewer in the limitations section of our Discussion.

2. Reviewer 1 suggests the title itself has an outcome judgement, that lock down was intelligent- it this what author wants to convey- than it is fine.

3. Additionally, Reviewer 1 asks to give an overview- even in the abstract- of why we author call it ‘intelligent’- suggesting a definition of it will be helpful.

We refer to an ‘intelligent’ lockdown because this was the official term used for the lockdown measures taken by the Dutch government. The term is meant to contrast the Dutch lockdown, in which efforts were made to limit the economic and social effects of the measures as much as possible, to alternative forms of lockdown, in which measures like shop closures were expected to have larger economic and/or social consequences.

We address this issue by now briefly clarifying this term in the introduction and at greater length in a new section explaining the Dutch context.

4. Line 39 It is an established fact, however, evidence/citation will be helpful.

We now provide additional references to Queisser, Adema & Clarke (2020) for analyses of the effects of COVID-19 on women’s employment across OECD countries and the European Institute for Gender Equality, EIGE, 2019) as well as the US Bureau of Labor Statistics (2020) for evidence about the overrepresentation of women in these sectors and occupations.

5. Line 44: at gender perspective another important point that can be reflected is the negative effect of their/women's lack of participation. In other words, they also contribute substantially to national economy/GDP, and lack of participation has a direct effect on that.

Reviewer 1 provides an interesting remark about the likely negative impact of women’s job losses and lower participation rates on the economy. We agree with the Reviewer. However, focusing on this remark is beyond the scope of this paper as our argument relates to gender inequality in society and at home rather than any broader macro-economic effects.

6. Reviewer 1 suggests that the LISS data needs to explained as there can be bias due to the dataset itself. Moreover, at Line 135 Reviewer 1 notes: The findings are regressions analysis are an outcome of how representative LISS panel is, currently it is difficult to assess that, some description may help.

We have substantially reworked the methods section to provide clearer information about the questionnaire we fielded as well as the panel in which it was embedded. The methods section now includes the design of the study, data collection, ethical considerations, and measurements (operationalizations) of all dependent and independent variables.

In this section, we also provide more details on the LISS panel study. “The LISS panel is a representative, online survey panel based on a true probability sample drawn from Dutch population registers by the Dutch National Statistics Office (CBS). There is no self-selection into the sample and households without an internet connection are provided with the necessary broadband connection. Refreshment samples are drawn periodically to ensure continued representativeness of the panel’s sample.”

7. Reviewer 1 comment c) Difference of pre and post covid is not being established through background as well as result section, some relationship demonstration will be extremely important.

Differences between the time period pre- and post-COVID-19 were measured in two ways: First, by the introduction of retrospective items in the questionnaire. Respondents were instructed in prompts to each question to report on their work and home situations “prior to the Corona crisis” or “at this moment”. Second, some questions asked respondents to compare their current situation to the pre-COVID-19 situation, for example, asking whether work in the evening hours happened “more or less often” than prior to COVID-19 and the lockdown measures. We have added more details about the measurement of respondents’ pre-COVID-19 status and the measurement of respondents’ status during the COVID-19 lockdown in April through questions in which respondents report on their situation “at this moment”. Post-COVID measurements are, unfortunately, not yet possible. In both the methods and the results sections, we have been careful to make the different measurements more explicit.

Reviewer 2

Major issues

Grammar

The authors sometimes report in the past tense and sometimes in the present tense. This creates confusion throughout the text. I suggest the authors make improvements.

We carefully edited the text to correct this issue. The manuscript is now written in the present tense, with the exception of the methods section and the explanation of lockdown measures in place in April, which we report in the past tense.

Title

To bring more focus, it would help to mention the design at the end of the title.

We have adjusted the title, which now reflects the survey design of our study. “‘Intelligent’ lockdown, intelligent effects? Results from a survey on gender (in)equality in paid work, the division of childcare and household work, and quality of life among parents in the Netherlands during the Covid-19 lockdown”

Abstract

The content of the abstract seems not fully summarize the main text. For example, it is difficult to find out where the results are reported and what the final conclusion of the study is. Also, a main limitation was not mentioned.

We have re-written the abstract, using sub-headings to ensure we summarize the main text. We have now included a main limitation in the sub-section Discussion on the cross-sectional design of our study.

Introduction

Gender inequality is the main topic of the study, but the authors did not introduce the subject. Also, terminology is often not or not clearly defined. Furthermore, I miss a rationale for a longitudinal study. The final problem here is that the purpose of the study and the objectives (did you have three objectives related to the themes? Or more?) remain unclear.

We have rewritten the introduction, clarifying any terminology used for readers less familiar with these terms, including gender inequality (defined in the text as the unequal division or distribution of tasks or resources between men and women) and the meaning of gender inequality indices. We have clarified the objectives of the study more clearly at the end of the introduction. We have removed all mentions of a longitudinal study here because the findings we report on here are cross-sectional.

Method

It remains unclear what type of design was used. I understand that an exploratory, longitudinal study was mentioned in the introduction, but it would be helpful if the authors would start the method section mentioning the design and giving an overview of the design.

We now start the method section with an extra heading, ‘study design’, in which we explain the cross-sectional nature of our survey study. In the long run, we will have longitudinal data – these are currently being collected but are not yet available. However, to avoid confusion, we have taken out all mention of a longitudinal study. We follow the sub-section on study design with a sub-section on data collection.

Ethical considerations

It is problematic that there is no paragraph concerning “Ethical considerations”. I would suggest the authors to add this paragraph in the method section, after the paragraph/sample.

This information has been added in a separate sub-section in the methods section.

Intervention

Furthermore, I understand that the authors did not conduct a study using a specific intervention themselves. Nevertheless, “the lockdown measures” may be seen as an intervention. I think it would be helpful if the authors would give a clearer picture of the lockdown intervention of the Dutch government. It might work to do this in the introduction section. I am confused about the questionnaire and the measures. Did the authors develop one questionnaire with multiple measures? It would be helpful if the authors give a clearer description of the applied questionnaire.

We have made the lockdown measures more explicit, bringing them together in one sub-heading on the Dutch situation in the introduction. These can indeed be seen as some type of intervention. In particular, we focus specifically on the government intervention of March 15th, including the closing of schools, childcare centres, and the requirement to work from home as much as possible.

To measure the impact of this government lockdown intervention, we administered a single questionnaire in April, containing both current and retrospective items investigating respondents’ experiences and conditions before and during the lockdown in April. We have now clarified this issue in the methods section.

Data-analysis

Also, I found it somewhat confusing to find out how data was analysed. I understand there were three main themes (dependent variables) and also independent variables. But how were these analysed? Could the authors help the reader to improve readability here? For example, is it possible to start sentences like, “To analyse… data… we used …”?

We have rewritten the methods section (following the description of dependent and independent variables) to clarify the data analysis methods used: descriptive techniques (cross-tabulations) and two multivariate techniques: linear probability modelling, and multinomial logit modelling. We agree that this improves the readability of the paper.

Results

Due to the writing style in the results section, it seems that the authors mixed up results and conclusions. The headings and subheadings seem somewhat suggestive and cause confusion about the reported topics. I guess it will help the reader if the authors stay closer to the themes and topics of data-collection and not use question marks.

We have rewritten the results section, moving all interpretations to the discussion to make the results section more factual and less suggestive.

Discussion and conclusion

The structure and order of this section is somewhat unclear. Again, the summary of the results and conclusions seem to be mixed up or at least it remains unclear what the results are and what the conclusions. Furthermore, it was unclear where and how each result was compared with results from other studies. Finally, I missed a general conclusion.

We have significantly rewritten these sections. We now start with a separate Conclusion section, providing conclusions for each of the three main themes. We then provide a Discussion section, in which we separate out the key points of discussion, the limitations to our study, areas for future research, and a final general conclusion.

Minor issues

I have listed my comments in the order of the issues’ appearance in the manuscript.

Title

The title seems not fully in line with the collected data. Particularly the “gendered work” and “family dynamics” seem different. In the main text I found out it was about “paid work dynamics” and “dynamics at home”. Also, I seem to miss quality of life here.

We have changed the title to Intelligent’ lockdown, intelligent effects? Results from a survey on gender (in)equality in paid work, the division of childcare and household work, and quality of life among parents in the Netherlands during the Covid-19 lockdown”

Abstract

Page 1, Line 2 .“This study examines …” seems incomplete. May it also be that the sentence is redundant? I would expect the relevance of the study first.

This sentence has been removed. And the objective of the study is now named first.

Line 8. “The question arises to what extent …” seems inappropriate and confusing, because it is not the research question. Could the authors be more specific what they mean here?

We have changed this sentence to clarify: Given gender inequality existent prior to the pandemic, particularly among parents, it is crucial to investigate the societal impact from a gender perspective.

Line 9. The design is missing here.

We have added information on the cross-sectional survey design here.

Line 10. “paid work, division of care and household work and quality of life seem not in line with the description in the main text.

We have carefully gone through the text to ensure this description matches. The manuscript focuses on paid work (where and when men and women work and the work pressure they experience), how they divide childcare and housework, and their quality of life as measured by differences in leisure time, work-life balance, and relationship dynamics, as noted in the parentheses behind the sentence on Line 10.

Line 11. The specification of quality of life seems redundant here.

As quality of life can be interpreted in multiple ways, and has different dimensions, we have chosen to describe the three dimensions used here. See also our response to the point at Line 10.

Line 12. it would be helpful to split the sentence and describe the analysis method and results separately. Please start a sentence with “Results showed…”

We have added sub-headings to the abstract to clarify, and now begin the sub-heading ‘Results’ with the sentence “The results show…” Note that in accordance with previous comments from the reviewers, we have written the results section in the present tense.

Line 13: It would be appropriate to report a final conclusion here and then refer to the longitudinal study / or further study…

We have now included a sub-heading “Conclusion” where we present the conclusion and one sentence on further research.

Introduction

Pg 2. Line 27. Since gender inequality is the main subject of the study, authors are recommended to define and operationalize the concept.

This concept has been defined here in the introduction as: “the unequal division or distribution of tasks or resources between men and women”. The operationalization can be found in the methods section and pertains to the three themes 1) paid work 2) division of care and household work and 3) quality of life.

Pg 3. Line 57. To start a new paragraph with a question, i.e. “How do the sudden changes …”, does not invite to read on. I would suggest the authors to rewrite the sentence.

This sentence has been rewritten.

Line 74 “For a thorough understanding of … other countries, …” Compared to what countries? US? Please be specific here.

We have specified that we are referring to countries not yet reported on, such as Canada and/or other European countries.

Pg 5. Line 114. I do not understand the relevance of the sentence “Against this backdrop, …”. Please explain in text or maybe delete the sentence?

We have rewritten this sentence and restructured this paragraph, which we feel helps to clarify the relevance. “The so-called ‘intelligent’ lockdown could potentially be a catalyst to change the persistent structural gender inequalities embedded in this Dutch work and family model [28].”

Line 119. This is the first time that the authors mention the design (exploratory study). To improve readability, it will help if the authors define and give a rationale for an exploratory study here (see also major issues). Also, I think the authors conducted a longitudinal study? I would recommend to add this here.

We have removed the reference to the exploratory design here to avoid confusion. The cross-sectional survey design is clarified in the abstract and in the methods section. We report on the cross-sectional survey design here and will collect longitudinal data (more waves) in the future.

Line 120. The text “we aim to provide …” in combination with the text in line 122 “We aim to answer the question confuses me. I suggest to describe and distinguish purpose and objectives here. Also, the text in line 123 “… increase or decrease gender inequality in work and family dynamics” seems incomplete compared to the three main themes mentioned in the method section. Please revise the text, to bring the content in line with the method section.

We appreciate the reviewer’s careful reading of the text here, allowing for clarification, and carefully distinguishing purpose and objectives. We have removed any mention of the term ‘family dynamics’, referring explicitly to the division of household and childcare work throughout the text. We have also rewritten the research question: To what extent did the COVID-19 ‘intelligent’ lockdown impact gender differences in paid work, the division of childcare and household work, and quality of life of Dutch parents?

Line 125-126. Again, this list seems not in line with the method section. Please rewrite.

We have improved the structure in the whole manuscript, including on these lines.

Line 127. The text between brackets seems redundant here. It would be helpful if the authors define the quality of life earlier in the text.

This has been removed and we report on the three dimensions of quality of life in the abstract.

Materials and methods

The order and content of this section confuses me. Below some suggestions.

We thank the reviewer for these helpful suggestions. The methods section has been rewritten to take these suggestions into account.

Pg 6. Line 132. It would help to start with a heading/Method, followed by a subheading “Design” and give an overview of the design here.

We have added this subheading and an overview of the study design.

Line 135. It seems there is some duplication here. The sample is also explained below. I suggest that the authors delete the description of the sample here.

We have removed this description here.

Line 142. The authors use the term “sample frame” here. In line 145 the authors describe that 16 respondents were excluded. This may suggest that the researchers used inclusion criteria. This seems a bit confusing. If so, I would recommend the authors to be consistent and use the concepts of the “inclusion and exclusion”.

We have removed the mentioning of the sample frame here and use inclusion criteria. We also explain why the 16 respondents were excluded. We retain the mention of the analytical sample, which refers to all respondents in the analysis. We explain this term for purposes of clarity.

Line 143. “This resulted in” … meaning “a selection of … were included”? Please be consistent here as well.

We have changed this into “This selection consisted of 1,234 panel members”.

Line 145. It would be helpful if the authors would add the numbers and specific reasons why these 16 respondents were excluded.

We now explain why these respondents were excluded. In most cases (14) this was because they did not meet the inclusion criteria, as these respondents had not been in paid employment prior to the Covid-19 outbreak. This can happen when the respondents are marked as matching the sample inclusion conditions in the LISS-panel, but self-report their employment status differently in the questionnaire we applied (usually because their employment status has changed since the most recent questionnaire they completed).

In two cases, respondents were excluded because of comments flagging their replies as invalid. The survey included an open question at the end, in which respondents were encouraged to leave any comments and remarks about the survey. The two respondents in question noted that they were currently not working due to pregnancy leave or parental leave, but said they had filled in all questions as if they weren’t on leave. Hence, data from these cases were excluded for being invalid.

Pg 7. Line 151. The heading “Measures” confuses me. Did the authors use multiple measures? Also, I do not understand why the authors chose not to describe the questionnaire here. I would recommend the authors to describe the questionnaire if possible. I think it would be more appropriate to add the first sentences of the following paragraph (dependent variables) “We explore three themes ….reported by one respondent” to the “Measures” paragraph.

We administered a survey questionnaire that contained multiple measurements. To clarify, and to avoid any potential confusion with the lockdown measures, we have changed the heading here accordingly. In this Measurements sub-section, we describe the questions we administered in the questionnaire and start with the sentence mentioned by the reviewer. We included additional sub-headings for the three themes and for the covariates. Finally, we include a reference to the codebook, including the questionnaire, in the running text.

Line 164.

If possible, I suggest it would help the readers if the authors would add another subheading here, i.e. “paid work dynamics” and add subheadings for the other three themes too.

We have introduced sub-headings for all three themes.

Line 165. To improve readability, it would help if the authors would start this paragraph and sentence with "To explore the impact on paid work dynamics ..." and bring the other themes/dependent variables in line with this.

We have included this sentence under all three sub-headings.

Line 171. The word “analyses” seems confusing in this context. Please reformulate.

We have changed this into “variables”. We meant that we conduct separate analyses for working more or less hours on normal workdays, normal days off, evenings, and weekends.

Pg 8. Line 174. I suggest to add a subheading “dynamics at home” and use “to explore”.

We have added these subheadings and used the term “to explore” as suggested by the reviewer.

Line 175. “We used relative measures…”. I find this confusing, possibly because the developed questionnaire (which was mentioned before) was not clearly described. I would suggest to make changes to improve understanding.

We now provide additional information on the questionnaire and how it was developed. In relation to this particular issue, we now explain: “Respondents indicated, relative to their partner, how much housework and, in separate questions, how much caregiving tasks (including home schooling and help with homework) they did prior to and during the lockdown. These questions are each measured separately using a 7-point scale ranging from ‘I do nearly everything’ (1) to ‘My partner does nearly everything’ (7)”. We hope this improves understanding.

Line 178. Also, quality of life was a theme and needs a subheading (I think) to improve readability.

We agree with the reviewer on this point and have added this subheading.

Line 181. I understand the Likert-scale. Nevertheless, it would be helpful to describe “what number is good (1) and what is bad (2)” and do the same for the other Likert-scales.

We have included this in all relevant places in this section.

Line 187. The word “Lastly" seems confusing here, suggesting it was a theme. Please rewrite.

We have changed this into “Furthermore”.

Line 192. “We are primarily interested in exploring gender differences”. This sentence seems particularly relevant. I would suggest the authors it should be part of the design paragraph.

We have added this to the sub-section on study design.

Line 193. I found it interesting that the authors used a binary variable. How about gender neutrality and gender diversity? This may be relevant to mention somewhere in the text/intro/discussion?

We fully agree with the reviewer on this point. Unfortunately, the LISS-panel works with pre-existing socio-demographic variables, which rely on a binary coding of gender. There currently is no option to report one’s gender identity (including non-binary identification). We have added a point on this in the discussion, in the sub-section on future research.

Line 194. I guess the word “self-assessment” is redundant here, as it was mentioned before.

We have deleted this word.

Pg 9. Line 207. “Dutch mothers were overrepresented …”. I do not understand the relevance of this sentence here. Would it be more appropriate to add this to the discussion section?

We have deleted this sentence here.

Pg 10. I do not understand why the authors use the heading “Methods” here as it was partly used before. Did the authors mean analyses? That would be more in line with the text. I would like to ask the authors to make improvements here to strengthen the flow of the text. Also, I would suggest to follow the three aforementioned themes in this section, if possible, and describe how each theme was analysed or to be more specific what type of analysis belongs to what. For example, the authors may use sentences like: “To analyse…., … was used”.

We have changed the heading into ‘Data analysis’ which is indeed more appropriate. We have also changed the structure of this section, explicitly following the three themes (paid work, division of childcare and household work, and quality of life) and described what type of analysis was used for each theme. We feel this improves the flow of the text.

Pg 11. Line 250-252. This text seems more a conclusion than a result. I suggest the authors to check and delete these type of texts throughout the results section.

We have carefully edited the text to ensure any conclusions are removed from the results section and moved to the conclusion.

Line 254. The heading seems not appropriate as it is too long and too little in line with the three main themes. I would recommend the authors to follow the main themes for each subheading, use the word “paid work dynamics” here and make further changes for the other subheadings too in the result section, in line with the main themes and topics.

We have changed the subheadings to shorten and clarify, in line with the main themes and topics.

Line 256. It seems strange to start a sentence with a reference in a results section. It feels as if the results are mixed up with the discussion here. Please rewrite.

We have rewritten this sentence.

Line 260, The line “However, it would be misleading…” seems suggestive. Please rewrite.

We have deleted this sentence, as it was redundant.

Pg 12. Line 285-288. Another example where the text seems more a discussion than a presentation of the results. Possibly it is due to the writing style. Again, I would like to ask the authors to check writing style and present the results close to the results of the analyses.

We have rewritten this part and moved all interpretation to the discussion.

Pg 15. Line 305. As I reader, I realize that the authors studied data concerning the situation before and during the pandemic. Is that right? Then, I guess it would be helpful if the authors improve writing style.

We have asked the respondents about their work hours before and during the lockdown. We now explain this more clearly in the text.

Line 311. The authors mention the type of analysis here, but this was not consistently done throughout the section. I would recommend the authors more consistency in writing.

We have carefully edited the text to ensure this is done consistently throughout.

Pg 17. Line 334. I think that a subheading “Work pressure” would be more appropriate here.

This subheading has been changed in line with the reviewer’s comments.

Pg 18. Line 346. The authors mention “other analyses”, what do the authors mean here?

We were referring to the analyses on the other variables. We have deleted this sentence to avoid confusion.

Pg 25. Line 432. “… having less leisure time’. Compared to what? Also, “This decline in leisure time is significantly gendered”. This seems a conclusion.

This is in comparison to the situation prior to the lockdown. We have added “…than before the lockdown” to clarify. The statement that the decline is significantly gendered is referring to the finding that the gender interaction is significant. We have changed this sentence to avoid it reading like a conclusion.

Pg 28. Line 476. The authors report on “free time here”. I am confused. What is the difference between leisure time and free time? Leisure time and free time were being used interchangeably. We have deleted any references to free time to avoid confusion.

Discussion and conclusion

Pg. 30. Line 500. Is this where the summary of the results starts? I am confused (see major issues). I would recommend the authors to be more specific about the main results here. The authors could or should consider to follow the main themes of the study.

As suggested by the reviewer, we have separated the conclusion and discussion sections. In the conclusion, we provide a summary of results across the three main themes of the study.

Line 520. I have some mixed feelings about the sentence “The changes…. For optimism”. Especially the word “optimism” seems confusing here. This may be, because it is not clear to me whether this is still a result or a conclusion. I suggest that the authors rewrite this sentence.

We rewrote the conclusion and discussion sections to disentangle our interpretations, limitations, and suggestions for future research. We also rewrote this particular sentence, avoiding the word ‘optimism’.

Line 526. I do not understand the relevance or purpose of the question. Please rewrite this sentence to improve the flow of the text. Maybe this question is relevant as an implication in the discussion section?

Longitudinal research needs to be conducted to investigate the long-term effects of the Covid-19 lockdown measures. In restructuring the discussion section, we rephrased this question to become a call for future longitudinal research.

Pg 32. I am not sure where in the discussion section the authors compared their results with the results of other studies. I recommend the authors to reconsider this matter and rewrite the discussion somewhat so readers can understand the results in a broader context.

We have rewritten the discussion section, and made the comparison with the results of other studies more explicit. For example, we now explicitly compare our findings on the decrease in leisure to an initial Eurofound study, and our findings on a decrease in gender inequality in the division of household work and childcare with findings from the US.

Line 576. Future research and limitations seem to be mingled. Please rewrite.

We have disentangled these sub-sections and re-written them.

Line 587. The authors discuss the strengths of the study here. I would suggest to mention these earlier in the discussion section before the limitations.

We have rewritten this part of the discussion and been very explicit about the key strength of our study: “A key strength of the findings presented here is that they provide evidence of the impact of an unprecedented lockdown based on a representative, probability-based sample among Dutch parents with a high response rate, thereby adding much-needed evidence to an international trend in which inequalities along gender and class lines are worsening [9,14,17–19].”

Pg 35. Line 601. “Studies such as ours demonstrate…”. Since it was an exploratory study, I would suggest the authors to formulate be a little more careful here”.

We have changed ‘demonstrate’ to ‘suggest’.

Line 611. I guess the following part of the text are concluding words. I miss a general conclusion, also in line with the purpose of the study.

We now provide a sub-section ‘General Conclusion’ at the end of the Discussion.

Final thoughts

I can imagine that the number of comments is somewhat disappointing. I hope the authors can appreciate this as a way to show that the study is an important contributor to the impact of the COVID-19 pandemic and that the comments are intended to make the manuscript easier to read.

We very much appreciate the time taken to review our manuscript in such detail. We agree that taking these comments into consideration has significantly improved the readability of the manuscript.

Attachment

Submitted filename: Response to reviewers.docx

Decision Letter 1

Srinivas Goli

30 Oct 2020

'Intelligent’ lockdown, intelligent effects? Results from a survey on gender (in)equality in paid work, the division of childcare and household work, and quality of life among parents in the Netherlands during the Covid-19 lockdown

PONE-D-20-22569R1

Dear Dr. Yerkes,

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Additional Editor Comments (optional):

Revisions are satisfactory to me. 

Reviewers' comments:

Acceptance letter

Srinivas Goli

12 Nov 2020

PONE-D-20-22569R1

‘Intelligent’ lockdown, intelligent effects? Results from a survey on gender (in)equality in paid work, the division of childcare and household work, and quality of life among parents in the Netherlands during the Covid-19 lockdown

Dear Dr. Yerkes:

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Associated Data

    This section collects any data citations, data availability statements, or supplementary materials included in this article.

    Supplementary Materials

    S1 Table

    A. Descriptive statistics. B. Linear Probability model: Essential occupation.

    (DOCX)

    S2 Table

    A. Distribution of employed respondents by work location. B. Distribution of employed respondents by work location and gender. C. Distribution of employed respondents by work location and educational background.

    (DOCX)

    S3 Table

    A. Working time adaptations by gender. B. Multinomial logistic regression of shifts in working time (ref. = no change to amount of work on normal days off). C. Multinomial logistic regression of shifts in working time (ref. = no change to amount of work in the evenings). D. Multinomial logistic regression of shifts in working time (ref. = no change to amount of work on the weekend).

    (DOCX)

    S4 Table. Perceived work pressure by gender.

    (DOCX)

    S5 Table

    A. Changes in relative share of care tasks. B. Division of care work by gender.

    (DOCX)

    S6 Table

    A. Changes in relative share of household tasks by gender. B. Division of household work by gender.

    (DOCX)

    S7 Table. Change in leisure time by gender.

    (DOCX)

    S8 Table. Ease or difficulty of combining work and care before and during the lockdown.

    (DOCX)

    S9 Table. Changes in work-life balance.

    (DOCX)

    S10 Table. Never had disagreements with partner on these issues.

    (DOCX)

    S11 Table. No change in disagreements with partner on these issues.

    (DOCX)

    S1 File

    (DOCX)

    Attachment

    Submitted filename: PONE-D-20-22569_reviewer.pdf

    Attachment

    Submitted filename: Reviewer comment 15082020.pdf

    Attachment

    Submitted filename: Response to reviewers.docx

    Data Availability Statement

    The data underlying the results presented in the study are available from the LISS archive (www.dataarchive.lissdata.nl). DOI: 10.17026/dans-x3d-e4fb


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