| Distinguished Professor of Economics, Syracuse University,
2005-present. |
| Senior Research Associate, Center for Policy Research, Syracuse
University, 2005-present. |
| Chair in Economics (part-time), University of Leicester, 2004-present. |
| George Summey, Jr. Professor of Liberal Arts, 1993-2005. |
| Professor of Economics, Texas A&M University, 1988-2005. |
| Visiting Professor, University of California-San Diego, 2002. |
| Visiting Professor, University of Arizona, 1996. |
| Associate Professor of Economics, University of Houston, 1984-1988. |
| Assistant Professor of Economics, University of Houston, 1979-1984. |
| Senior Research Associate, , 2005-present. |
| Research Fellow, , Munich Society for the Promotion of Economic Research,
2003-present. |
| Université Panthéon-Assas (Paris
II), Research Fellow, 2003-present. |
| Research Fellow, 2002. |
| , Bush Economics Fellow, 2001. |
| (PERC,) Research Fellow, 1991-2005. |
| Research Fellow,
1982-1988. |
| Research Fellow, University of Pennsylvania, 1977-1978. |
| Research Consultant, Wharton Econometric Forecasting Associates, Fall,
1997. |