1. Assistant Professor, Dept. of Construction Science, Texas A&M Univ., Francis Hall 333, 3137 TAMU, College Station, TX 77843 (corresponding author).
2. Associate Professor, School of Planning, Design and Construction, Michigan State Univ., 552 W. Circle Dr., East Lansing, MI 48824.
3. Assistant Professor, School of Planning, Design and Construction, Michigan State Univ., 552 W. Circle Dr., East Lansing, MI 48824.