Table 2. Effect of an additional child on maternal lifespan (in years).

	Model 1			Model 2			Model 3
	Pooled Tobit model w/o control			Pooled Tobit model			Multilevel Tobit model
	Β	std. err.	p	β	std. err.	p	β	std. err.	p
N of children	0.392	0.017	<0.001	0.101	0.020	<0.001	-0.193	0.020	<0.001
Age at last birth				0.240	0.009	<0.001	0.403	0.009	<0.001
Place of birth	Yes			Yes			Yes
Cohort fixed effects	No			No			Yes
N (Total)	81,927			81,927			81,927
N (Uncensored)	66,238			66,238			66,238
N (Censored)	15,689			15,689			15,689

Note: Models 1 & 2 use pooled-sample Tobit regressions, controlling for individuals’ place of birth in four regions. Model 3 uses the multilevel Tobit regression model conditioning on cohort fixed effects. All models use the full sample of 81,927 parous women.