Senior Fellow, Resources for the Future, 2006-present.
Fellow, Resources for the Future, 1993 - present.
Adjunct Professor, Georgetown University Public Policy Institute, Fall 2003.
Visiting Research Fellow, University of California at San Diego, Center for U.S.-Mexican Studies, Fall and Winter Quarters 2001.
Assistant Instructor, University of Texas at Austin, Department of Economics, 1990 - 1993.
Research Associate, Bureau of Business Research, Summer 1991.
Economist, U.S. Department of Agriculture, Economic Research Service, Summers 1988 - 1989.
Program Assistant, Asociación pour la Productivité, Fada N'Gourma, Burkina Faso and Washington, D.C., 1986 - 1987.
Litigation Paralegal, Hogan and Hartson, 1983 - 1985.