水库堤防工程与农业绩效、农业规模经济关系分析

Relationship between reservoir or embankment engineering and agricultural performance and scale economy

水库堤防工程对农业生产有重要的影响,量化评估水库堤防工程的农业绩效及分析水库堤防工程与农业规模经济之间关系,不仅可以完善农业生产理论,而且能为国家投资水库堤防工程提供合理的理论依据.针对这一问题,首先构建了固定效应模型,根据农业生产的实际情况,选择Cobb-Douglas生产函数作为农业生产函数,并在Cobb-Douglas生产函数基础上,综合考察了农业生产的基本要素、水库堤防工程、农业资源消耗、农业科技力量、育种对农业产出的影响,有效测度了各地区水库堤防工程的农业生产绩效;其次运用规模经济理论,根据水库堤防工程能够增加农业生产资源,保障农业生产要素发挥更大效用的机理,依托各地区水库堤防工程受益人口的总收益和人均收益,探讨了水库堤防工程与农业规模经济之间的关系.实证研究结果表明:水库堤防工程在农业经济增长发挥了重要作用;总体上,堤防工程在农业经济增长中的贡献度大于水库工程在农业经济增长中贡献度;水库堤防工程在农业经济增长中贡献度最大的地区是重庆,最小的地区是海南;随着水库堤防工程的完善,受益人口数量逐渐增加,受益人口的人均收益和总收益也逐渐增加,且受益人口的人均收益增加速度快于受益人口的增加速度,说明了水库堤防工程能够实现农业规模经济.

To evaluate the influence of reservoir dick engineering on agricultural production and agricultural scale economy, this paper constructs a fixed effect model at first, in which Cobb-Douglas production funciion is chosen as the agricultural production function according to the real situation in China, and the influences of reservoir and embankment engineering, consumption of agricultural resources, scientific and technical level of agriculture and breeding, and the agricultural performance of reservoir and embankment engineering in different regions on agricultural output are measured effectively. Then, this paper employs the theory of scale economy to study the relationship between reservoir or embankment engineering and agricultural scale economy. The results show that the reservoir and embankment engineering have important effect on the growth of agricultural economy. In general, the contribution of embankment engineering to the growth of agricultural economy is more than that of reservoir engineering. With the improvement of reservoir and embankment engineering, the population benefited will increase gradually, as well as the total benefit and the benefit per capita, where the acceleration of benefit per capita is greater than that of the population benefited, which indicates that reservoir and embankment engineering are able to realize agricultural scale economy.