Richard H. Thaler (; born September 12, 1945) is an American economist and the Ralph and Dorothy Keller Distinguished Service Professor of Behavioral Science and Economics at the University of Chicago Booth School of Business.
He is perhaps best known as a theorist in behavioral finance, and for his collaboration with Daniel Kahneman and others in further defining that field. In 2017, he was awarded the Nobel Memorial Prize in Economic Sciences for his contributions to behavioral economics. When discussing its selection of Thaler to receive the Nobel Prize, the Royal Swedish Academy of Sciences reasoned that his "contributions have built a bridge between the economic and psychological analyses of individual decision-making. His empirical findings and theoretical insights have been instrumental in creating the new and rapidly expanding field of behavioral economics." Wikipedia