1. Ph.D. Candidate, Dept. of Construction Management, Hang Lung Center for Real Estate, Tsinghua Univ., Beijing 100084, China.
2. Managing Director, Global Projects Center, Stanford Univ., Stanford, CA 94306.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Virginia Tech, 310A Bishop-Favrao Hall, Blacksburg, VA 24061 (corresponding author).
4. Professor, Dept. of Construction Management, Hang Lung Center for Real Estate, Tsinghua Univ., Beijing 100084, China.