1. Associate Professor, Del E. Webb School of Construction, Arizona State Univ., P.O. Box 870204, Tempe, AZ 85287-0204 (corresponding author). E-mail: ariaratnam@asu.edu
2. Attorney, Hall, Estill, Hardwick, Gable, Golden & Nelson, P.C., 320 South Boston Ave., Suite 400, Tulsa, OK 74103-3708. E-mail: jproszek@hallestill.com