1. Graduate Research Assistant, Dept. of Civil, Architectural and Environmental Engineering, The Univ. of Texas at Austin, 1 University Station C1752, Austin, TX 78712.
2. Assistant Professor, Dept. of Civil, Architectural and Environmental Engineering, The Univ. of Texas at Austin, 1 University Station C1752, Austin, TX 78712.
3. Associate Director, Construction Industry Institute, The Univ. of Texas at Austin, 3925 West Braker Ln. (R4500), Austin, TX 78759.
4. Economist, Office of Applied Economics, National Institute of Standards and Technology, Gaithersburg, MD 20899.