1. Associate Professor, College of Management and Economics, Tianjin Univ., Tianjin 300130, P.R. China.
2. Master, Business School of Hohai Univ., Nanjing 21110, P.R. China.
3. Associate Professor, College of Management and Economics, Tianjin Univ., Tianjin 300130, P.R. China (corresponding author).
4. Associate Professor, Civil and Environmental Engineering, Rutgers, State Univ. of New Jersey, 96 Frelinghuysen Rd., Piscataway, NJ 08854-8018.
5. Professor, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong, P.R. China.
6. Assistant Economist, Business Dept., Guangdong Electric Power First Engineering Bureau of China Energy Engineering Group, Guangzhou 510735, P.R. China.