1. Associate Professor, School of Management, Guangzhou Univ., 230 Daxuecheng Outer Ring W Rd., Panyu Di, Guangdong Province, Guangzhou 510006, China (corresponding author).
2. Rinker Professor, Rinker School of Construction Management, Univ. of Florida, 304 Rinker Hall, Gainesville, FL 32611-5703.
3. Lecturer, School of Civil Engineering and Built Environment, Queensland Univ. of Technology, Gardens Point, Brisbane, QLD 4001, Australia.