Testing the homogeneous marginal utility of income assumption
针对异质性消费者群体，提出一种检验所有个体是否具有相同收入边际效用函数的方法，该假设常用于需求研究和福利分析，并基于美国食品消费截面数据进行了应用。
We develop a test for the hypothesis that every agent from a population of heterogeneous consumers has the same marginal utility of income function. This homogeneous marginal utility of income (HMUI) assumption is often (implicitly) used in applied demand studies because it has nice aggregation properties and facilitates welfare analysis. If the HMUI assumption holds, we can also identify the common marginal utility of income function. We apply our results using a U.S. cross sectional dataset on food consumption.