1. Research Assistant, Center for Sustainable Systems, School of Natural Resources and Environment, Univ. of Michigan, 440 Church St., Dana Building, Ann Arbor, MI 48109.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Stanford Univ., 285B 473 Via Ortega Stanford, CA 94305.
3. Codirector, Center for Sustainable Systems, Professor, School of Natural Resources and Environment, and Professor, Civil and Environmental Engineering, Univ. of Michigan, 440 Church St., Dana Building, Ann Arbor, MI 48109 (corresponding author).
4. Research Fellow, Dept. of Design and Construction, Delft Univ. of Technology, Stevinweg 1 2628 CN Delft, The Netherlands.
5. Professor, Dept. of Civil and Environmental Engineering, College of Engineering, Univ. of Michigan, 2326 George G. Brown Laboratories, 2350 Hayward St., Ann Arbor, MI 48019.