First Author:   Yohei Mitani Institute of Behavioral Science, University of Colorado at Boulder and Graduate School of Economics, Waseda University ymitani@moegi.waseda.jp   1350 20th St. Apt. A-26 Boulder, 80302, USA   303-492-1348(Phone) 303-492-1348(Fax) http://homepage3.nifty.com/ymitani/indexe.html Second Author: Nicholas Flores Department of Economics and Institute of Behavioral Science, University of Colorado at Boulder Nicholas.Flores@colorado.edu