1. Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of Tennessee Knoxville, 851 Neyland Dr., 325 John D. Tickle Building, Knoxville, TN 37996.
2. Associate Professor and Construction Engineering and Management Program Coordinator, Dept. of Civil and Environmental Engineering, Univ. of Tennessee Knoxville, 851 Neyland Dr., 417 John D. Tickle Building, Knoxville, TN 37996 (corresponding author).
3. Assistant Professor, Dept. of Agricultural Economics, Mississippi State Univ., 255 Tracy Dr., 102 Lloyd-Ricks Watson Building, Mississippi State, MS 39762.