Frederick Henry Prince Professor of Economics,1997-present, University of Chicago; Professor of Economics, 1990-1996.
Visiting Scholar of the Research Department, Federal Reserve bank of Minneapolis, Fall 2000, Fall 2001.
Harold L. Stuart Professor of Managerial Economics, 1988-90, Department of Managerial Economics and Decision Sciences, Kellogg Graduate School of Management, Northwestern University; Department Chairman, 1987-89; Professor, 1983-87; Associate Professor, 1982-83; Assistant Professor, 1978-82.
Visiting Professor of Economics, Department of Economics, University of Chicago, 1983-84.
Visiting Professor of Economics, Department of Economics, University of Minnesota, Spring
1983.
Visiting Lecturer on Economics, Department of Economics, Harvard University, Fall 1982.