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. 2024 Jul 17;21(7):e1004399. doi: 10.1371/journal.pmed.1004399

Table 1. Price elasticities of beverages by income groups, 2018.

    Sugar sweetened beverages Unsweetened beverages Alcoholic beverages Light/diet beverages†
Dependent variable: Log of Quantity Acquired (in Liters)
Low income Elasticities -1.241 0.046 -0.122 -0.174
s.e. (0.015) (0.017) (0.053) (0.124)
p-value <0.001 0.006 0.022 0.160
Middle income Elasticities -1.186 0.030 -0.076 0.094
s.e. (0.019) (0.021) (0.047) (0.110)
p-value <0.001 0.150 0.108 0.397
High income Elasticities -1.126 0.066 -0.141 0.201
s.e. (0.022) (0.025) (0.048) (0.084)
p-value <0.001 0.007 0.003 0.018
Observations (n) 18,876 27,488 4,263 383

This category includes low-calorie or artificially sweetened beverages.

All regressions used microdata from POF 2017–2018. Income levels were divided using the tertiles of the distribution of the income per capita of the households. Other controls include logarithm of prices of other products (11 categories included), of income (in levels and squared), characteristics of household head (schooling, age, gender, race), total number of household members, and total number of children living within the household (all ages). All regressions are weighted using sample survey weights. Standard errors (se) are clustered by socioeconomic status and presented in parentheses.