论文标题
基于U统计的治疗效应异质性测试
A U-statistic-based test of treatment effect heterogeneity
论文作者
论文摘要
许多研究包括确定不同亚群中是否存在治疗效应异质性的目标。在本文中，我们提出了一个基于U统计的非参数检验，即无效假设，即治疗效应在不同的亚组中是相同的。当违反后者的基本分布假设时，提出的测试比标准参数测试提供了更多的功率。我们将该方法应用于计划有效性的经济研究中的数据，并发现不同亚群中存在治疗效应异质性。
Many studies include a goal of determining whether there is treatment effect heterogeneity across different subpopulations. In this paper, we propose a U-statistic-based non-parametric test of the null hypothesis that the treatment effects are identical in different subgroups. The proposed test provides more power than the standard parametric test when the underlying distribution assumptions of the latter are violated. We apply the method to data from an economic study of program effectiveness and find that there is treatment effect heterogeneity in different subpopulations.
