1. College of Business and Economics, Rauch Business Center, Lehigh University, 621 Taylor Street, Bethlehem, PA 18015-3117 and National Bureau of Economic Research.
2. Department of Economics, National Taiwan University, 21 Hsu-Chow Road, Taipei (100), Taiwan, and National Bureau of Economic Research.
3. City University of New York Graduate Center, 365 Fifth Avenue, 5th Floor, Suite 5318, New York, NY 10016 and National Bureau of Economic Research.
4. Department of Economics and Finance, Baruch College, City University of New York, 365 Fifth Avenue, 5th floor, Suite 5318, New York, NY 10016 and National Bureau of Economic Research.