Chong-en Bai is the Mansfield Freeman Chair Professor of the School of Economics and Management, Tsinghua University. His research areas include economic institutions, public economics, economic growth and development, and China's economy. Qiong Zhang is an Associate Professor of the School of Public Administration and Policy, Renmin University of China. Her research focuses on labor, population, and economic growth. Her research interests mainly relate to family economics and public economics.