1. Research Associate and Ph.D. Candidate, Dept. of Building and Real Estate, The Hong Kong Polytechnic Univ., Hunghom, Kowloon, Hong Kong. E-mail: bsgrace_polyu@yahoo.com.hk
2. Professor, Dept. of Building and Real Estate, The Hong Kong Polytechnic Univ., Hunghom, Kowloon, Hong Kong. E-mail: bsedchan@polyu.edu.hk