 Zupan served as dean and professor of economics at the University of Arizona's Eller College of Management from 1997 to 2003.Before his appointment at Arizona, Zupan taught at the University of Southern California's Marshall School of Business, where he also served as associate dean of master's programs.He was a teaching fellow in Harvard's Department of Economics while pursuing his doctoral studies at MIT, and he has been a visiting faculty member at the Amos Tuck School of Business Administration at Dartmouth College.