1. Associate Professor, School of Management, Xi’an Univ. of Architecture and Technology, Xi’an, Shaanxi 710055, China.
2. Professor, Dept. of Technology, Illinois State Univ., Turner 5100, Normal, IL 61790 (corresponding author).
3. Rinker Professor, Rinker School of Construction Management, Univ. of Florida, Gainesville, FL 32611.
4. Professor, School of Management, Xi’an Univ. of Architecture and Technology, Xi’an, Shaanxi 710055, China.