1. China Academy for Rural Development, Zhejiang University, Hangzhou, Zhejiang Province, China
2. School of Public Affairs, Zhejiang University, Hangzhou, Zhejiang Province, China
3. National School of Development, Peking University, Beijing, China
4. Center for Enterprise Research, Peking University, Beijing, China
5. Department of Agricultural, Food and Resource Economics, East Lansing, MI, USA