The Monthly Food Stamp Cycle: Shopping Frequency and Food Intake Decisions in an Endogenous Switching Regression Framework
研究发现食品券家庭在收到福利后头三天食品支出激增，其中42%每月只购物一次的家庭在第四周能量摄入显著下降，而其他家庭摄入稳定。该模型同时解释了购物频率和食物摄入决策，对影响购物频率的政策有启示。
Abstract Mean food spending by food stamp households peaks sharply in the first three days after benefits are received. For those who conduct major grocery shopping trips only once per month (42% of all food stamp households), mean food energy intake drops significantly by the fourth week of the month. For the remaining households, intake remains steady over the course of the month. These patterns motivate an empirical model that simultaneously accounts for the shopping frequency and food intake decisions over time. Results have implications for policies that may affect the frequency of grocery shopping by food stamp households.