[1] Univ Cambridge, Dept Land Econ, Cambridge CB3 9EU, England
[2] UCL, Dept Math, London WC1E 6BT, England
[3] Eindhoven Univ Technol, Dept Built Environm, NL-5600 MB Eindhoven, Netherlands
[4] Dalian Univ Technol, Fac Infrastruct Engn, Dept Construct Management, Dalian, Peoples R China
[5] Southeast Univ, Sch Civil Engn, Dept Construct & Real Estate, Nanjing 210096, Peoples R China
[6] Natl Univ Singapore, Sch Design & Environm, Dept Built Environm, Singapore 117566, Singapore