Alex Tabarrok is an economist and professor at George Mason University. He is known for his work on law and economics, public choice theory, and the economics of innovation. Tabarrok is the director of research for the Independent Institute and co-founder of Marginal Revolution University, an online platform for learning economics. He has authored numerous academic papers and co-authored several books, including 'Modern Principles of Economics.' Tabarrok is also a contributor to various economics blogs and a prominent figure in the field of libertarian economics.