不同灌溉方式下种粮大户技术效率及其差异研究——基于非参数共同前沿方法

A Study on Technical Efficiency and Differences of Large Grain Growers Under Different Irrigation method-Based on Nonparametric Meta-frontier Model

种粮大户的灌溉方式对粮食生产技术效率的提高具有重要作用。依据535个种粮大户的调查数据,运用非参数共同前沿方法和DEA模型测算了共同前沿和群组前沿下种粮大户的技术效率,运用技术缺口比率(TGR)分析了不同灌溉方式下种粮大户间的生产技术差距。结果表明:种粮大户的技术效率整体不高;共同前沿下,不同群组种粮大户的技术效率水平由高到低依次为:节水灌溉、传统灌溉和不灌溉。群组前沿下,3个群组的技术效率值均高于共同前沿下的技术效率值,群组前沿下的效率值被高估了;采用不同灌溉方式的3个群组间种粮大户的生产技术存在显著差距。

The irrigation methods of large grain growers play an important role in improving the technical efficiency of grain production.Based on the survey data of 535 large grain growers,this paper uses nonparametric meta-frontier method and DEA model to measure the technical efficiency of metafrontier and group frontier,uses the technology gap ratio（TGR） to analyze the differences in the production technology between large grain growers.The results show that the technical efficiency of large grain growers is not high;under the metafrontier,the technical efficiency levels of big grain farmers in different groups from high to low are：water saving irrigation,traditional irrigation and non irrigation;the technical efficiency values with respect to the group frontiers are higher than that to the meta-frontiers,so the group frontiers are overestimated;there are significant gaps in the production technology of large grain growers of three groups using different irrigation methods.