of;
Economics;
and;
Management;
China;
Agricultural;
University;
Beijing;
100083;
P.R.China;
Center;
for;
Rural;
Economy;
Ministry;
of;
Agriculture;
Beijing;
100810;
P.R.;
China;
of;
Management;
Tianjin;
University;
Tianjin;
300072;
PR.China;
International;
Research;
Center;
for;
Agricultural;
Sciences;
Tsukuba;
305-8686;
Japan;
粮食产量; 农业政策; 气候因素; 调查数据; 中国农村; 全要素生产率; 月平均气温; 证据;