1. CentER, Tilburg University, 5037 AB Tilburg, Netherlands;
2. Centre for Economic and Policy Research, London EC1V 0DX, United Kingdom;
3. Booth School of Business, University of Chicago, Chicago, Illinois 60637;
4. National Bureau of Economic Research, Cambridge, Massachusetts 02138;
5. Naveen Jindal School of Management, University of Texas at Dallas, Richardson, Texas 75080