基于DEA-Tobit两步法的主产区玉米生产技术效率分析

摘要

The Panel Data of com production in 11 provinces are analzed, such as Jilin, Heilongjiang, Liaoning, Inner Mongolia, Hebei,Shandong, Henan, Anhui, Jiangsu, Hubei and Sichuan. Based on the CRS, VRS and Malmquist exponential models of DEA, technical efficiency of corn production is measured in main producing region by DEA-Tobit. And its influencing factors are analyzed. Result shows that corn production in main producing areas is mainly scale inefficiency and is at the stage of decreasing returns to scale. Pure technical efficiency of corn production is effective in most main producing regions. Total Factor Productivity of corn production is improved in main producing regioas, because the speed of technical progress is greater than the speed of efficiency reduction. In the years 1998 -2008, corn production in main producing regions is rational in structure and is not affected by the natural disasters.%以1998～2008年玉米主产区(吉林、黑龙江、辽宁、内蒙古、河北、山东、河南、安徽、江苏、湖北、四川)的面板数据为基础,基于DEA的CRS、VRS和Malmquist指数模型,运用DEA-Tobit两步法测度主产区玉米生产的技术效率,并分析其影响因素.结果表明,主产区玉米生产多为规模无效,且普遍处于规模报酬递减阶段;主产区玉米生产多为纯技术效率有效;主产区玉米生产全要素生产率提高主要是由于技术进步速度大于技术效率下降的速度.1998～2008年,玉米主产区的生产结构合理,并未受到自然灾害的影响.