“I’ve always been interested in using mathematics to make the world work better.”
That’s Al Roth from a profile in Forbes. Roth has applied heavy-duty theory to the very practical problems of matching doctors to residency programs, children to schools, economists to departments and kidneys to patients in a way that is stable, incentive-compatible, and maximizes the gains from exchange. In my view, Roth is the most influential economist working today. Influential among other economists? Yes. But what I really mean is influential in the world.