Alex Tabarrok is the Bartley J. Madden Chair in Economics at the Mercatus Center at George Mason University and a professor of economics at George Mason University. He has written extensively about health care policy, patent-system reform, the effectiveness of bounty hunters, how judicial elections bias judges, and how local poverty rates impact trial decisions by juries. He has also written about methods for increasing the supply of human organs for transplant, the regulation of pharmaceuticals by the FDA, and voting systems. During the pandemic, Tabarrok was an advisor to the US government on using incentives to accelerate vaccine production. Tabarrok's papers have appeared in Science, The Journal of Human Resources, The Journal of Law and Economics, the Journal of Health Economics, The Proceedings of the National Academy of Sciences (PNAS) and many other journals.

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Tabarrok is the coauthor, with Mercatus colleague Tyler Cowen, of the popular economics blog Marginal Revolution and cofounder of the online educational platform Marginal Revolution University. He is the coauthor of Modern Principles of Economics and his popular articles have appeared in the New York Times, the Washington Post, the Wall Street Journal, and many other prestigious publications.