1. University of California at Davis, Economics Department, 1126 SSH, One Shields Avenue, Davis, CA 95616 and National Bureau of Economic Research (NBER).
2. Cornell University, School of Hotel Administration, 545C Statler Hall, Ithaca, NY 14853-6902.
3. Dartmouth College, Economics Department, 6106 Rockefeller Hall, Hanover, NH 03755 and NBER.