1. Assistant Professor, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Kansas, 1530 W. 15th St., 2150 Learned Hall, Lawrence, KS 66045 (corresponding author).
2. Professor, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado at Boulder, 428 UCB, 1111 Engineering Dr., Boulder, CO 80309-0428.
3. Professor and Head, Dept. of Construction Engineering and Management, Pontificia Universidad Catölica de Chile, Casilla 306, Correo 22, Santiago 7820436, Chile.