Bryan Douglas Caplan (born April 8, 1971) is an American economist and author. Caplan is a professor of economics at George Mason University, research fellow at the Mercatus Center, adjunct scholar at the Cato Institute, and former contributor to the Freakonomics blog and EconLog. He currently publishes his own blog, Bet on It. Caplan is a self-described "economic libertarian". The bulk of Caplan's academic work is in behavioral economics and public economics, especially public choice theory.