机译:非洲经委会地区小农收购稻米种子的交易成本分析:基于坦桑尼亚的经验证据
[1]Ministry of Agriculture Food Security and Cooperatives, Institutional Economics, Dares Salaam P.O. Box 2066, Tanzania;
[2]Mikocheni Agricultural Research Institute, Dares Salaam P.O. Box 6226, Tanzania;
[3]Uyole Agricultural Research Institute, Mbeya P.O. Box 400, Tanzania;