Matthew Shou-Chung Shum

Principal Economist
Amazon.com
e-mail: mshum.work@gmail.com

Full CV: Download PDF CV

Employment History

Current position: Amazon.com: Principal Economist, Selling Partner Services; 2023-present.

Previous positions: California Institute of Technology, Division of Humanities and Social Sciences, William D. Hacker Professor of Economics, 2022-2024; J. Stanley Johnson Professor, 2016-2022; Professor of Economics, 2008-2016.

Johns Hopkins University, Department of Economics, Professor, 2008; Associate professor with tenure, 2004-2008; Assistant professor, 2000-2004.

University of Toronto, Department of Economics, Assistant professor, 1998-2000.

Union Bank of Switzerland, Economics group, analyst, 1992-1993.

Professional Honors

• Fellow of the Econometric Society, elected 2021.
• Fellow of the International Association of Applied Econometrics, elected 2020.

Education

Stanford University, Economics, Ph.D. 1998. Thesis: Three Essays in Empirical Industrial Organization. Supervisor: Frank A. Wolak.

Columbia University, Economics, B.A. 1992.

Research

For the complete publication list, working papers, editorial activities, grants, student supervision, and service, please see the updated PDF CV.

Selected recent publications include:

1. “Rethinking Reference Dependence: Wage Dynamics and Optimal Stopping Rules in Taxis” with Nick Buchholz and Haiqing Xu. Accepted, Journal of Political Economy, 2025.
2. “Combining Choices and Response Times in the Field: a Drift-Diffusion Model of Mobile Advertising” with K. Chiong, R. Webb, and R. Chen. Management Science, 70(2), February 2024.
3. “Yogurts choose Consumers? Identification of Discrete-Choice Models via Two-Sided Matching” with Odran Bonnet, Alfred Galichon, Yu-Wei Hsieh, and Keith O'hara. Review of Economic Studies, 89(6), 3085-3114, November 2022.

Updated from CV dated February 2026.

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