John M. Yun is an Associate Professor of Law at the Antonin Scalia Law School, George Mason University, and the Deputy Executive Director at the Global Antitrust Institute (GAI).

Prior to joining Scalia Law, he was an Acting Deputy Assistant Director in the Bureau of Economics, Antitrust Division, at the U.S. Federal Trade Commission (FTC). Also at the FTC, he has served as the Economic Advisor to Commissioner Joshua D. Wright, as well as a staff economist. His experience includes the analysis of horizontal mergers, vertical restraints, and exclusionary conduct.

Over an eighteen year career at the FTC, he has presided over numerous high-profile matters and investigations into various industries including consumer products, retail, intermediate goods, and digital markets. His research interests include law and economics, antitrust, regulatory policy, and industrial organization, and he has published in academic journals including the International Journal of Industrial Organization, Economic Inquiry, International Review of Law and Economics, and the Review of Industrial Organization. He has also taught economics at Georgetown University, Emory University, and Georgia Tech. He received his BA in economics at UCLA and his PhD in economics at Emory University.