1. Business School, Hohai University, Nanjing, China
2. School of Architecture, Construction Economics and Management, Ardhi University, Dar es Salaam, Tanzania
3. Faculty of Engineering, Built Environment and Information Technology, Central University of Technology, Free State, Bloemfontein, South Africa
4. School of Earth Sciences, Real Estate, Business and Informatics, Ardhi University, Dar es Salaam, Tanzania