1. John Curtin Distinguished Professor, Dept. of Civil Engineering, Curtin Univ., GPO Box U1987, Perth, WA 6845, Australia (corresponding author).
2. Professor, Birmingham City Business School, Birmingham City Univ., Perry Bar, Birmingham B42 2SU, U.K.
3. Professor, Institute of Sustainable Development and Architecture, Bond Univ., Gold Coast, QLD 4229, Australia.