1. Statistical Analysis of Missing Not at Random Problems with a Nonparametric Regression Model and Semiparametric Missingness Mechanism. Restricted (Penn State Only) Author: Sudhakar Shetty, Samidha Title: Statistical Analysis of Missing Not at Random Problems with a Nonparametric Regression Model and Semiparametric Missingness Mechanism. Graduate Program: Statistics Keywords: Efficient influence function model misspecificationnonignorable missing datapropensity of missing datarobust estimationsemiparametric statistics.Nonignorable missing dataSemiparametric statisticsEfficient influence functionRobust estimationEfficient estimation File: Login to Download Committee Members: Bing Li, Professor in Charge/Director of Graduate StudiesYanyuan Ma, Chair & Dissertation AdvisorXiaoyue Niu, Major Field MemberRongling Wu, Outside Unit & Field MemberBing Li, Major Field Member