Kam Wing Chan is Professor of Geography at University of Washington. His main research focuses on China's cities, migration, employment, and the household registration system. He is the author of Cities with Invisible Walls: Reinterpreting Urbanization in Post-1949 China (Oxford University Press, 1994). He has served as a Consultant for the World Bank, Asian Development Bank, United Nations, and McKinsey & Co. and worked on a number of policy projects on China. His recent commentaries and interviews have appeared in Wall Street Journal, New York Times, The Economist, South China Morning Post, BBC, CBC Radio, Caixin, Ming Pao and China Daily. Visit his web page at http://faculty.washington.edu/kwchan/