1. Graduate Research Assistant, School of Building Construction, Georgia Institute of Technology, 280 Ferst Dr., Atlanta, GA 30332-0680.
2. Associate Professor and Brook Byers Institute for Sustainable Systems Fellow, Director of the Economics of Sustainable Built Environment Lab, School of Building Construction and School of Civil and Environmental Engineering, Georgia Institute of Technology, 280 Ferst Dr., Atlanta, GA 30332-0680 (corresponding author).