Do Food Stamps Contribute to Obesity in Low‐Income Women? Evidence from the National Longitudinal Survey of Youth 1979
利用1979年全国青年纵向调查数据，采用双重差分匹配估计方法，研究食品券福利对低收入女性肥胖、超重和体重指数的影响，发现食品券并非导致女性参与者肥胖的原因。
This article estimates the effects of food stamp benefits on obesity, overweight and body mass index of low‐income women. My analysis differs from previous research in three aspects. First, we exploit a rich longitudinal dataset, the National Longitudinal Survey of Youth 1979, to distinguish between full‐time and part‐time participation. Second, instead of making parametric assumptions on outcomes, we employ a variety of difference‐in‐difference matching estimators to control for selection bias. Third, we estimate both short‐term (one‐year participation) and long‐term (three‐year participation) treatment effects. We find little evidence that food stamps are responsible for obesity in female participants.