1. METHODOLOGICAL APPROACHES TO INCORPORATE HETEROGENEITY IN TRAFFIC ACCIDENT SEVERITY Open Access Author: Shyu, Ming-Bang Title: METHODOLOGICAL APPROACHES TO INCORPORATE HETEROGENEITY IN TRAFFIC ACCIDENT SEVERITY Graduate Program: Civil Engineering Keywords: Covariance Heterogeneity ModelNested Logit ModelAccident Severity ModelHeterogeneityHeteroskedastic Extreme-Value Model File: Download Ming-Bang_Shyu-Dissertation-Final.pdf Committee Members: Venkataraman Shankar, Committee Chair/Co-ChairMartin T Pietrucha, Committee MemberThorsten Wagener, Committee MemberEvelyn Ann Thomchick, Committee Member