In this article, to improve the doubly robust estimator, the nonlinear regression models with missing responses are studied. Based on the covariate balancing propensity score (CBPS), estimators for the regression coef...In this article, to improve the doubly robust estimator, the nonlinear regression models with missing responses are studied. Based on the covariate balancing propensity score (CBPS), estimators for the regression coefficients and the population mean are obtained. It is proved that the proposed estimators are asymptotically normal. In simulation studies, the proposed estimators show improved performance relative to usual augmented inverse probability weighted estimators.展开更多
Interventions with multivalued treatments are common in medical and health research,leading to a growing interest in developing estimators for multivalued treatment effects using observational data.In practice,missing...Interventions with multivalued treatments are common in medical and health research,leading to a growing interest in developing estimators for multivalued treatment effects using observational data.In practice,missing outcome data is a common occurrence,which poses significant challenges to the estimation of treatment effects.In this paper,we propose two multiply robust estimators for estimating the general multivalued treatment effects with outcome missing at random,including the average treatment effect(ATE),quantile treatment effect(QTE),and expectile treatment effect(ETE).The resulting estimators are root-n consistent and asymptotically normal,provided that the candidate models for the propensity score contain the correct model,and so do the candidate models for either the probability of being observed or outcome regression.Extensive simulation studies are conducted to investigate the finite-sample performance of the proposed estimators.The proposed methods are also applied to a real-world dataset of the Chinese Health and Retirement Longitudinal Study(CHARLS)with about 21%outcome missing,estimating the ATE,QTE and ETE of three types of social activities on the cognitive function of middle-aged and elderly people in China.展开更多
文摘In this article, to improve the doubly robust estimator, the nonlinear regression models with missing responses are studied. Based on the covariate balancing propensity score (CBPS), estimators for the regression coefficients and the population mean are obtained. It is proved that the proposed estimators are asymptotically normal. In simulation studies, the proposed estimators show improved performance relative to usual augmented inverse probability weighted estimators.
基金supported by National Key R&D Program of China(Grant No.2023YFA1011400)National Natural Science Foundation of China(Grant Nos.12371265 and 12271239)+3 种基金Natural Science Foundation of Shanghai(Grant No.21ZR1420700)Shenzhen Fundamental Research Program JCYJ20220818100602005(Grant No.20220111)Fundamental Research Funds for the Central Universities(Grant No.2022QKT001)Postdoctoral Fellowship Program of China Postdoctoral Science Foundation(Grant No.GZB20240292)。
文摘Interventions with multivalued treatments are common in medical and health research,leading to a growing interest in developing estimators for multivalued treatment effects using observational data.In practice,missing outcome data is a common occurrence,which poses significant challenges to the estimation of treatment effects.In this paper,we propose two multiply robust estimators for estimating the general multivalued treatment effects with outcome missing at random,including the average treatment effect(ATE),quantile treatment effect(QTE),and expectile treatment effect(ETE).The resulting estimators are root-n consistent and asymptotically normal,provided that the candidate models for the propensity score contain the correct model,and so do the candidate models for either the probability of being observed or outcome regression.Extensive simulation studies are conducted to investigate the finite-sample performance of the proposed estimators.The proposed methods are also applied to a real-world dataset of the Chinese Health and Retirement Longitudinal Study(CHARLS)with about 21%outcome missing,estimating the ATE,QTE and ETE of three types of social activities on the cognitive function of middle-aged and elderly people in China.
