[1] Univ Manchester, Sch Mech Aerosp & Civil Engn, Pariser Bldg, Manchester M1 7JR, England
[2] Australian Natl Univ, ANU Coll Business & Econ, Res Sch Management, 26 Kingsley St, Acton, ACT 2601, Australia
[3] Univ Cape Town, Dept Construct Econ & Management, Private Bag, ZA-7701 Rondebosch, Cape Town, South Africa
[4] Tsinghua Univ, Dept Construct Management, Beijing 100084, Peoples R China