[1] Stanford Univ, Econ Emeritus, Stanford, CA 94305 USA
[2] Univ Calif Irvine, Dept Econ, Irvine, CA 92717 USA
[3] Univ Calif Irvine, Sch Law, Irvine, CA 92717 USA
[4] Stanford Inst Econ Policy Research, Irvine, CA USA
[5] All Souls Coll, Oxford, England
[6] UNU MERIT, Maastricht, Netherlands
[7] Ecole Polytech & Telecom ParisTech, Res Program Digital Econ, Paris, France
[8] Amer Enterprise Inst Publ Policy Res, Washington, DC USA
[9] Univ Calif Santa Barbara, Dept Econ, Santa Barbara, CA 93106 USA
[10] Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA
[11] Natl Bur Econ Res, Resources Future, Cambridge, MA 02138 USA
[12] Natl Bur Econ Res, Cambridge, MA 02138 USA
[13] Charles River Associates Inc, Boston, MA USA
[14] CALTECH, Econ, Pasadena, CA 91125 USA
[15] Stanford Univ, Econ, Stanford, CA 94305 USA
[16] Columbia Univ, Int & Publ Affairs, New York, NY 10027 USA
[17] CRA Int, Boston, MA USA