Speaker：Professor Yanyuan Ma（Dept of Statistics, Pennsylvania State University, USA）

  • Event Date: 2023-02-14
  • Speaker:  /  Host:


Topic：Robust and Efficient Estimation under Nonignorable Missing Response

Speaker：Professor Yanyuan Ma（Dept of Statistics, Pennsylvania State University, USA）

Date Time：Tue. Feb 14, 2023, 3:30 PM - 4:20 PM 

Place： 4F-427, Assembly Building I
 

Online Seminars- Google Meet
https://meet.google.com/sqy-fzus-oog
 Abstract
 
We consider the estimation problem in a regression setting where the outcome variable is subject to nonignorable missingness and identifiability is ensured by the shadow variable approach. We propose a versatile estimation procedure where modeling of missingness mechanism is completely bypassed. We show that our estimator is easy to implement and we derive the asymptotic theory of the proposed estimator. We also investigate some alternative estimators under different scenarios. Comprehensive simulation studies are conducted to demonstrate the finite sample performance of the method. We apply the estimator to a children's mental health study to illustrate its usefulness.

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