Steven D. Levitt is an American economist best known for his work in the field of behavioral economics. He is a professor at the University of Chicago and co-author of the popular book Freakonomics, which explores the hidden side of everyday issues using economic theory. His research often focuses on unconventional topics, revealing surprising insights about human behavior. Levitt's work has earned him recognition for applying economic principles to diverse areas such as crime, education, and health. He has received several awards, including the prestigious John Bates Clark Medal, which honors outstanding economists under the age of 40.