1. Finance Department, Leavey School of Business, Santa Clara University, Santa Clara, California 95053;
2. Finance Department, Kenan-Flagler Business School, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599;
3. National Bureau of Economic Research, Cambridge, Massachusetts 02138;
4. Division of Research and Statistics, Federal Reserve Board, Washington, District of Columbia 20551;
5. Finance Department, Fisher College of Business, The Ohio State University, Columbus, Ohio 43210