My research can be categorized into two main strands: the first is primarily in international economics but also overlaps with economic geography; and the second is at the intersection of international economics, economic geography and environmental economics.

Published/Accepted Papers

• “Spatial Equilibria: The Case of Two Regions,” with Konstantin Kucheryavyy and Andrés Rodríguez-Clare, Journal of International Economics, Vol. 152, November 2024

  • • NBER Working Paper Version, Dec 2021; 

    • Previous draft: “Necessary and Sufficient Conditions for Uniqueness in Spatial Equilibria: The Case of Two Locations,” , Feb 2019

    • Online Appendix

• “Grounded by Gravity: A Well-Behaved Trade Model with Industry-Level Economies of Scale,” with Konstantin Kucheryavyy and Andrés Rodríguez-Clare , American Economic Journal: Macroeconomics, Vol. 15, Issue 2, Pages 372 -412, April 2023

  • • NBER Working Paper Version, August 2016 [NBER ITI Summer 2016 Schedule]; 

    • Online Appendix; Codes and Data; Interval Solution Animation

• “External Economies and International Trade Redux: Comment” with Andrés Rodríguez-Clare, Quarterly Journal of Economics, Vol. 128, No. 4, Pages 1895 -1905, November 2013 

  • • Online Appendix 

Working Papers

• “The Economic Effects of Climate Change in Dynamic Spatial Equilibrium” with Ivan Rudik, Weiliang Tan and Ariel Ortiz-Bobea, May 2023 [Revision requested by Journal of Political Economy: Macroeconomics]

  • • Media: ISU News Service, The Economic Times

• “Tariff Theories in a Trade War,” with Ben Li and Xing Xu , May 2025 [New draft] 

Work in Progress

• “Anti-Granular Comparative Advantage,” with Jianwei Ai, Haoran Li,  Anton Yang and Wendong Zhang 

• “Structural Estimation of the Gravity Model of Trade: Scale Economies and Supply-Chain Linkages,” with Russell Hillberry, and Anton Yang 

• “Decreasing Costs in International Trade” 

• "Climate Policies in Dynamic Spatial General Equilibrium"

Old Working Papers

• ““Marshallian Externalities, Comparative Advantage and International Trade,” with Andrés Rodríguez-Clare, Feb 2013, University of California Berkeley Working Paper  

• “Coming to America: Immigration and Labor Market Dynamics,” with Jiaming Mao [Preliminary and Incomplete]