James Tobin was born in Champaign, Illinois, in 1918. He received his bachelor's degree in 1939 and his master's degree in 1940, both from Harvard. Following naval service during the years 1942-6, he returned to his graduate studies and received his PhD from Harvard in 1947. In 1950, he joined the economics department at Yale University, and he has largely remained at Yale and has been identified with this institution throughout his career. He twice directed the Cowles Foundation for Research in Economics, first from 1955 to 1961, and then from 1964 to 1965. He also served for two years, 1961-2, as a member of President Kennedy's Council of Economic Advisors. In 1981, he was awarded the Nobel Prize in Economics for his many important and diverse contributions to economic theory.