The Effect of SNAP on the Composition of Purchased Foods: Evidence and Implications
利用大型零售面板数据，研究补充营养援助计划（SNAP）参与对家庭购买食品构成和营养含量的影响，发现参与效应较小，且缩小高、低社会经济地位家庭间的食品支出差距无法消除健康食品消费差距。
We use detailed data from a large retail panel to study the effect of participation in the Supplemental Nutrition Assistance Program (SNAP) on the composition and nutrient content of foods purchased for at-home consumption. We find that the effect of SNAP participation is small relative to the cross-sectional variation in most of the outcomes we consider. Estimates from a model relating the composition of a household’s food purchases to the household’s current level of food spending imply that closing the gap in food spending between high- and low-SES households would not close the gap in summary measures of food healthfulness.