1. Research Engineer, Construction Industry Institute, Univ. of Texas at Austin, Austin, TX 78759.
2. Associate Professor, Dept. of Civil Engineering, Univ. of Kentucky, Lexington, KY 40506.
3. Raymond Shaver Chair Professor, Dept. of Civil Engineering, Univ. of Kentucky, Lexington, KY 40506.
4. Professor, Dept. of Statistics, Univ. of Kentucky, Lexington, KY 40506.