1. Questrom School of Business, Boston University, Boston, Massachusetts 02215;
2. Centre for Economic and Policy Research (CEPR), London EC1V 0DX, United Kingdom;
3. European Corporate Governance Institute (ECGI), 1000 Brussels, Belgium;
4. Naveen Jindal School of Management, University of Texas at Dallas, Richardson, Texas 75083;
5. Department of Quantitative Finance, National Tsing Hua University, Hsinchu 300044, Taiwan