1. Ph.D. Candidate, School of Building Construction, Georgia Institute of Technology, 280 Ferst Dr., Atlanta, GA 30332-0680 (corresponding author).
2. Professor and Chair, School of Building Construction, Georgia Institute of Technology, 280 Ferst Dr., 1st Floor, Atlanta, GA 30332-0680.
3. Ph.D. Candidate, Dept. of Construction Management, Louisiana State Univ., 3135 Patrik F. Taylor Hall, Baton Rouge, LA 70803.