1. Doctoral Student, Dept. of Civil and Environmental Engineering, Carnegie Mellon Univ., 5000 Forbes Ave., Pittsburgh, PA 15213 (corresponding author). E-mail: heather.wakeley@gmail.com
2. Executive Director, Green Design Institute, Carnegie Mellon Univ., Tepper School of Business, 5000 Forbes Ave., Pittsburgh, PA 15213. E-mail: mwg@andrew.cmu.edu
3. Professor, Dept. of Civil and Environmental Engineering, Carnegie Mellon Univ., 5000 Forbes Ave., Pittsburgh, PA 15213. E-mail: cth@cmu.edu
4. Associate Professor, Dept. of Civil and Environmental Engineering and Engineering and Public Policy, Carnegie Mellon Univ., 5000 Forbes Ave., Pittsburgh, PA 15213. E-mail: hsm@cmu.edu