On Doubly Robust Estimation with Nonignorable Missing Data Using Instrumental Variables
利用工具变量处理不可忽略缺失的双重稳健估计
Suppose we are interested in the mean of an outcome that is subject to nonignorable nonresponse. This paper develops new semiparametric estimation methods with instrumental variables which affect nonresponse, but not the outcome. The proposed estimators remain consistent and asymptotically normal even under partial model misspecifications for two variation independent nuisance components. We evaluate the performance of the proposed estimators via a simulation study, and…