Independent, University of Warwick - Warwick Business School, Brookings Institution, The American Consumer Institute, ESC Company, NERA Economic Consulting, George Washington University - Regulatory Studies Center, Independent, Carnegie Mellon University - School of Computer Science, University of Pennsylvania - Wharton School, University of Oxford, Smith School, National Economic Research Associates Inc. (NERA) (Deceased), Francisco Marroquin University, Council on Foreign Relations (CFR) - Council on Foreign Relations- Washington D.C., University of Virginia School of Law, Econ One, Chapman University - Economic Science Institute, Marsh & McLennan Companies - Cambridge Office, Advanced Analytical Consulting Group, Inc., London Business School and Kansas State University - Department of Economics

University of Pennsylvania - Wharton School and Carnegie Mellon University - School of Computer Science

University of Pennsylvania - Wharton School and Carnegie Mellon University - School of Computer Science