1. Efficient parameter estimation methods using quantile regression in heteroscedastic models Open Access Author: Xu, Zhanxiong Title: Efficient parameter estimation methods using quantile regression in heteroscedastic models Graduate Program: Statistics Keywords: quantile regressionheteroscedastic modelsoptimal weightingcomposite quantile regression File: Download Final_Dissertation.pdf Committee Members: Zhibiao Zhao, Dissertation Advisor/Co-AdvisorZhibiao Zhao, Committee Chair/Co-ChairRunze Li, Committee MemberLingzhou Xue, Committee MemberTao Yao, Outside Member