Efficient Estimation of Data Combination Models by the Method of Auxiliary-to-Study Tilting (AST)
通过辅助样本向研究样本倾斜法(AST)有效估计数据组合模型
We propose a locally efficient estimator for a class of semiparametric data combination problems. A leading estimand in this class is the average treatment effect on the treated (ATT). Data combination problems are related to, but distinct from, the class of missing data problems with data missing at random (of which the average treatment effect (ATE) estimand is a special case). Our estimator also possesses a double robustness property. Our procedure may be used to…