1. Three Essays on Firm Productivity in Industrial Organization and International Trade Open Access Author: Zhang, Hongsong Title: Three Essays on Firm Productivity in Industrial Organization and International Trade Graduate Program: Economics Keywords: heterogeneous productivityindustrial organizationinternational tradeimport File: Download HZhang_Dissertation.pdf Committee Members: Mark John Roberts, Dissertation Advisor/Co-AdvisorMark John Roberts, Committee Chair/Co-ChairJames R. Tybout, Committee MemberPaul L E Grieco, Committee MemberSpiro E Stefanou, Committee Member