Affiliation: | a Department of Business, Chungnam National University, 79 Daehakro, Yuseong-gu Daejeon 305-764, Republic of Korea b Department of Computer Science, New Jersey Institute of Technology, Newark, NJ 07102, USA c Department of Information, Operations & Management Sciences, Stern School of Business, New York University, 44 West 4th Street, New York, NY 10012-1126, USA |