1. Graduate Research Assistant, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado, Boulder, ECOT 515, Boulder, CO 80309-0428 (corresponding author).
2. Nicholas R. Petry Professor in Construction Engineering and Management, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado, Boulder, CO 80309.
3. Associate Professor and Terrell-McDowell Chair of Construction Engineering and Project Management, Dept. of Civil Engineering, Univ. of Kentucky, Lexington, KY 40506-0281.