1. Stern School of Business, Management and Organizations, New York University , 40 West 4 Street, New York, NY 10012, USA . e-mail: cfang@stern.nyu.edu
2. School of Business, Yonsei University , 50 Yonsei-ro, Seodaemun-gu 03722, Republic of Korea . e-mail: jhkim@yonsei.ac.kr