First Author:   Tai-Sen He Economics Programme, School of Social Sciences, Nanyang Technological University ts.he@ntu.edu.sg         Second Author: Gabriel Yong Ping Chua Economics Programme, School of Social Sciences, Nanyang Technological University chuaypg@yahoo.com.sg         Third Author: Hui Jun Er Economics Programme, School of Social Sciences, Nanyang Technological University erhuijun@gmail.com         Fourth Author: Shao Yi Liaw Economics Programme, School of Social Sciences, Nanyang Technological University liawshaoyi@hotmail.com