1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Yonsei Univ., Seoul 120-749, Korea.
2. Professor, Dept. of Civil and Environmental Engineering, Yonsei Univ., Seoul 120-749, Korea (corresponding author).
3. Ph.D. Student, Dept. of Civil and Environmental Engineering, Yonsei Univ., Seoul 120-749, Korea.
4. Postdoctoral Research Fellow, Economics of the Sustainable Built Environment (ESBE) Lab, School of Building Construction, Georgia Institute of Technology, GA.