1. Kenan-Flagler Business School and Frank Hawkins Kenan Institute of Private Enterprise University of North Carolina at Chapel Hill, , USA
2. Department of Economics, Frank Hawkins Kenan Institute of Private Enterprise, USA University of North Carolina at Chapel Hill, Kenan-Flagler Business School, , and Centre for Economic Policy Research (CEPR), UK
3. University, A. B. Freeman School of Business Tulane , USA