1. Assistant Professor, OHL School of Construction, Florida International Univ., 10555 West Flagler St., EC 2934, Miami, FL 33174 (corresponding author).
2. Associate Professor, Dept. of Civil, Architectural and Environmental Engineering, The Univ. of Texas at Austin, 1 University Station C1752, Austin, TX 78712.
3. Research Engineer, Construction Industry Institute, The Univ. of Texas at Austin, 3925 West Braker Ln. (R4500), Austin, TX 78759.
4. Associate Director, Construction Industry Institute, The Univ. of Texas at Austin, 3925 West Braker Ln. (R4500), Austin, TX 78759.
5. Chief, Applied Economics Office, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8600, Gaithersburg, MD 20899.
6. Economist, Applied Economics Office, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8600, Gaithersburg, MD 20899.