Zhongdong Ma (Ph.D., McMaster University, 1993) is an Associate Professor of Social Science. He recently served as Director of the Center for Demography and Sustainable Development at HKUST (2006–2010). His research interests include internal migration and human capital transfer in the Asia-Pacific region; fertility, quantitative methods; geographical information systems (GIS). He was the first researcher who conducted a survey of returned labor migrants in China and studied their occupational changes after returning to the countryside. He was recently awarded Second Prize for a paper in China’s Fifth National Competition in Population Science (2010). In addition to numerous HKUST Direct Allocation Grants, he has been awarded RGC grants for “Labor, Poverty Relief, and Income Growth in Rural China” (2004-5), “The Triangular Flow of Human Capital: China, Hong Kong, the United States, and Canada” (1997–2001). Recent publications include “Immigration Transition and Return Migration in Hong Kong” and “Supports for the Elderly under the Market Transition in China”.