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运用协整分析、格兰杰因果关系检验、VAR模型、脉冲响应函数以及岭回归方法,研究要素价格变动对农业能源效率的影响。实证研究结果表明:能源要素、资本要素以及劳动力要素价格与农业能源效率存在长期的均衡关系。3种要素价格都是农业能源效率的格兰杰原因,而反向的格兰杰因果关系则不存在。能源价格和劳动力价格对能源效率产生正向影响,其上涨1%分别使能源效率提高0.341%和0.364%;而资本价格对能源效率的影响却相反,资本价格下降1%会可使能源效率提高0.084%。应进一步推进要素价格的市场化改革,形成有效的价格约束机制;同时应充分利用价格手段,加快农业产业结构升级,提高农业能源效率。
Cointegration analysis, Granger causality test, VAR model, impulse response function and ridge regression method are used to study the impact of factor price changes on agricultural energy efficiency. The empirical results show that there are long-term equilibrium relationships between energy elements, capital elements and labor factor prices and agricultural energy efficiency. The prices of the three factors are Granger causes of agricultural energy efficiency, while the reverse Granger causation does not exist. Energy prices and labor costs have a positive impact on energy efficiency, with a 1% rise in energy efficiency by 0.341% and 0.364%, respectively; while capital costs have the opposite effect on energy efficiency, a 1% fall in capital prices can lead to an increase in energy efficiency 0.084%. Market-oriented reform on factor prices should be further promoted to form an effective price restraint mechanism. At the same time, we should make full use of price means to speed up the upgrading of agricultural industrial structure and improve the energy efficiency of agriculture.