1. Associate Professor, Dept. of Management Science and Engineering, College of Economics and Management, Nanjing Univ. of Aeronautics and Astronautics, Nanjing, Jiangsu 211106, China (corresponding author).
2. Associate Professor, School of Building Construction, College of Design, Georgia Institute of Technology, Atlanta, GA 30332.
3. Associate Professor, Dept. of Construction Management and Real Estate, College of Civil Engineering, Southeast Univ., Nanjing, Jiangsu 210096, China.