Independent, University of Warwick - Warwick Business School, Brookings Institution, The American Consumer Institute, ESC Company, NERA Economic Consulting, George Washington University - Regulatory Studies Center (deceased), Independent, Carnegie Mellon University - School of Computer Science, University of Pennsylvania - Wharton School, Technology Policy Institute, 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 Maryland - Department of Economics, Brookings Institution, Technology Policy Institute, University of California, Berkeley - Business & Public Policy Group, Massachusetts Institute of Technology (MIT) - Department of Economics, Clemson University, University of California, Los Angeles (UCLA) - School of Law, Yale School of Management (Deceased), Stanford University, Criterion Economics, Inc., Massachusetts Institute of Technology (MIT) - Sloan School of Management, Econ One, Chapman University - Economic Science Institute, Marsh & McLennan Companies - Cambridge Office and Institute for Business Innovation