A note on the equivalence of two semiparametric estimation methods for nonignorable nonresponse

摘要

We consider semiparametric estimation with nonignorable nonresponse data where only a parametric response model is assumed. We clarify the relationship of existing estimators and propose a new estimator which attains the semiparametric efficiency bound and is robust to model misspecification. (C)2018 Elsevier B.V. All rights reserved.