1. Assistant Professor, School of Sustainable Engineering and the Built Environment, Arizona State Univ., P.O. Box 870204, Tempe, AZ 85287-0204 (corresponding author).
2. Professor and Chair, Construction Engineering and Management Program, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin–Madison, 2320 Engineering Hall, 1415 Engineering Dr., Madison, WI 53706.
3. Professor, Dept. of Statistics, Univ. of Wisconsin–Madison, 1300 University Ave., Madison, WI 53706.