1. Department of Decision Sciences and Managerial EconomicsChinese University of Hong Kong Shatin N.T. Hong Kong, China
2. Department of Management SciencesCity University of Hong Kong
Tat Chee Avenue
Kowloon Hong Kong, China
3. Department of Logistics Engineering and ManagementSun Yat-sen University
135 Xin-Gang Xi Road
Guangzhou China
4. Hang Seng Management College Shatin Hong Kong, China