-Chairman, 1998-2005; Sarah Gibson Blanding Professor of Policy Analysis, 1998-present; Department of Policy Analysis and Management, Cornell University
-Research professor, German Institute for Economic Research, Berlin, 2000-present
-Visiting scholar, Goethe Universitat, Frankfurt, 1988; visiting professor, The European University Viadrina, Frankfurt (Oder), 1996; visiting scholar, Federal Reserve Bank of San Francisco, 2000; visiting fellow, Australia National University, Department of Economics, 2003
-Professor of economics, The Maxwell School, Syracuse University, 1990-1998
-Fellow, Netherlands Institute for Advanced Study in the Humanities and Social
Sciences, Institute of the Royal Netherlands Academy of Arts and Sciences, Wassenaar, the Netherlands, 1990-1991
-Assistant professor, 1979-1982; associate professor, 1982-1985; professor, 1985-1990, Department of Economics, Vanderbilt University
-Visiting scholar of economics, University of Wisconsin, 1984-1985
-Consultant, Urban Institute, 1978-1981; United Nations in Panama, 1983-1984; Research Triangle Institute, 1984-1985
-Research associate, Institute for Poverty Research, University of Wisconsin, 1977-1979
-Economist, Office of Policy Evaluation/Income Security, U.S. Department of Health, Education, and Welfare, 1976-1977
-Research assistant, University of Chicago, 1973-1976
-Mathematics teacher trainer, Peace Corps, Kingston, Jamaica, 1970-1972
-Mathematics teacher, Trenton High School, New Jersey, 1969-1970
Ph.D., economics, University of Chicago
M.A., economics, Rutgers University
B.A., economics, St. Vincent College