1. PhD Candidate, Division of Construction Engineering and Management, School of Civil Engineering, Purdue Univ., West Lafayette, IN 47907.
2. Associate Professor, Division of Construction Engineering and Management, School of Civil Engineering, Purdue Univ., West Lafayette, IN 47907-2051 (corresponding author).
3. Professor, Division of Construction Management, Michigan State Univ., East Lansing, MI 48824.