An Inquiry on the Heterogeneous Effects of Taxes Levied on Soda
34 Pages Posted: 9 Oct 2018 Last revised: 11 Nov 2019
Date Written: September 4, 2018
Taxes on sugar sweetened beverages (SSBs) are proposed with the promise of improving public health outcomes as people curb SSBs consumption and thus, sugar intake. However, they also bring an equity concern due to their potential regressive nature. I evaluate the soda tax introduced in Berkeley in 2015 with two questions in mind: What has been the effect of the policy in actual sugar intake, and what are the differences in treatment effects across income groups? This research is the first to get closer to the aim of the policy by looking at actual sugar intake, merging retailer point-of-sale (POS) data with the matched Nutrition Fact information on sugar. I find that sugar intake has fallen, but at a lower rate compared to liquid content. This is an indication that the policy has provided an incentive to buy SSBs with higher sugar concentration. Furthermore, the evaluation is incomplete if equity is not addressed as well, especially when the public health concern affects low-income households disproportionately. By taking advantage of the richness in POS data, I follow consumer goods' indexes (baskets) representing income groups' SSBs consumption. I find that the reduction in sugar and liquid consumption has been fairly homogeneous across the different baskets, with middle income groups' baskets facing the deepest reduction in consumption of sugar and liquid.
Keywords: Excise Taxation, Sales Taxes, Soda Taxes, Local Governments, Health Policy, Taxation and Inequality
JEL Classification: H21, H22, H23, H71, H75, I12, I14, I18
Suggested Citation: Suggested Citation