Qinghua Shi, male, Ph.D. in management, born in Xiangyuan, Shanxi in 1964 and now a professor of the Management School of Shanghai Jiaotong University. He mainly engages in the study of rural household economic behaviors and a great deal of teaching. Address: 535 Road Fahuazhen, Shanghai, 200052; Tel:86-21-62932577-8609(office); E-mail:shq@mail.sjtu.edu.cn Haiying Gu, female, Ph.D. in economics, born in Shanghai in 1956 and now a professor of the Management School of Shanghai Jiaotong University. She mainly engages in the study of rural economic issues and a great deal of teaching.Address: 535 Road Fahuazhen, Shanghai, 200052; Tel:86-21-62932577-8611(office); E-mail:ghy@sjtu.edu.cn