1. Ph.D. Candidate, Tishman Construction Management Program, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., G.G. Brown Bldg., Ann Arbor, MI 48109.
2. Professor, Tishman Construction Management Program, Dept. of Civil and Environmental Engineering, Univ. of Michigan, 2350 Hayward St., G.G. Brown Bldg., Ann Arbor, MI 48109 (corresponding author).