Matching on the Estimated Propensity Score
基于估计倾向得分的匹配AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确以评估研究中的平均处理效应为目标,分析倾向得分匹配及其方差修正,因此直接对应因果推断方向。
基于估计倾向得分的匹配AI 解读 ↓
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Propensity score matching estimators (Rosenbaum and Rubin, 1983) are widely used in evaluation research to estimate average treatment effects. In this article, we derive the large sample distribution of propensity score matching estimators. Our derivations take into account that the propensity score is itself estimated in a first step, prior to matching. We prove that first step estimation of the propensity score affects the large sample distribution of propensity score matching estimators. Moreover, we derive an adjustment to the large sample variance of propensity score matching estimators that corrects for first step estimation of the propensity score. In spite of the great popularity of propensity score matching estimators, these results were previously unavailable in the literature.