arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.15023stat.ME
收藏

观察性研究中处理效应异质性的非参数检验

Nonparametric tests for treatment effect heterogeneity in observational studies

Maozhu Dai, Weining Shen, Hal S. Stern

摘要:

我们考虑了观察性研究中处理效应异质性的检验问题,提出了一种基于多样本U统计量的非参数检验方法。为了解释潜在的混杂因素,我们使用重新加权的数据,其中权重由估计的倾向得分确定。所提出的方法不需要对结局进行任何参数假设,并且绕过了对每个研究亚组的处理效应进行建模的需要。我们建立了检验统计量的渐近正态性,并通过模拟研究证明了其优越的数值性能。两个真实的数据应用,包括就业计划评估研究和中国的独生子女政策的心理健康研究进行了讨论。

英文摘要:

We consider the problem of testing for treatment effect heterogeneity in observational studies, and propose a nonparametric test based on multisample U-statistics. To account for potential confounders, we use reweighted data where the weights are determined by estimated propensity scores. The proposed method does not require any parametric assumptions on the outcomes and bypasses the need for modeling the treatment effect for each study subgroup. We establish the asymptotic normality for the test statistic, and demonstrate its superior numerical performance over several competing approaches via simulation studies. Two real data applications including an employment program evaluation study and a mental health study of China's one-child policy are also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑