1. Construction Management Program, School of Planning, Design and Construction, Michigan State Univ., 116, Human Ecology, East Lansing, MI 48824-1030 (corresponding author).
2. Construction Management Program, School of Planning, Design and Construction, Michigan State Univ., 114, Human Ecology, East Lansing, MI 48824-1030.
3. Del E. Webb School of Construction, Arizona State Univ., Main Campus, P.O. Box 0204, Tempe, AZ 85287-0204.