1. Department of Finance, Cheung Kong Graduate School of Business, Beijing 100006, China;
2. Department of Marketing, Robert H. Smith School of Business, University of Maryland, College Park, Maryland 20742;
3. Department of Marketing and Behavioural Science, Sauder School of Business, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada;
4. Department of Marketing, Cheung Kong Graduate School of Business, Beijing 100006, China