1. Department of Construction and Real Estate, School of Management, Harbin Institute of Technology, P. O. Box: 1251, No. 13, Fayuan Street, Harbin 150001, China; Department of Building and Real Estate, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
2. School of Economics and Management, North China University of Technology, Beijing 100041, China
3. Department of Construction and Real Estate, School of Management, Harbin Institute of Technology, P. O. Box: 1251, No. 13, Fayuan Street, Harbin 150001, China
4. Department of Building and Real Estate, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China