Alexander Taghi Tabarrok (born November 11, 1966) is a Canadian-American economist. With Tyler Cowen, he co-authors the economics blog Marginal Revolution. Tabarrok and Cowen have also ventured into online education with Marginal Revolution University. Tabarrok is a professor at Virginia's George Mason University and Bartley J. Madden Chair in Economics at the school's Mercatus Center. In addition, Tabarrok is director of research for the Oakland, California based think tank the Independent Institute. He is the son of the late mechanical engineering professor Behrooz (Bez) Tabarrok.