"Following his graduate studies, he became an assistant professor of economics at the Washington University in St. Louis (WUSTL) in 1977, where he also worked as a research associate at the Center for the Study of American Business before he was promoted to associate professor in 1983 and to full professor in 1986.Later, Weingast became affiliated with the Hoover Institution, first as a senior research fellow in 1987 and then as a senior fellow in 1990, which he still holds.