Food Stamps and the Market Demand for Food
比较了基于精确非线性聚合与线性聚合方法估算的补充营养援助计划（食品券）对食品市场需求的影响，发现非线性聚合下只有受益家庭贡献需求响应，估计值更小。
This article compares estimates of disaggregated market food demand responses to the Supplemental Nutrition Assistance Program benefits based on exact nonlinear aggregation to responses based on linear aggregation. By accounting for income inequality, nonlinear aggregation implies that only the households that receive benefits contribute to market demand responses. In contrast, linear aggregation presumes all households receive benefits and thus contribute to the market demand response. The consequence is that nonlinear market estimates are smaller than the linear estimates by roughly the fraction of households that receive benefits.