中国省域生态效率的时空差异、要素分解与节能减排潜力

Study on the spatial-temporal disparities,factor decomposition of China's provincial ecological efficiency and the potentials of energy saving and emission reduction

将经济生产过程中的自然资源消耗与环境污染排放视为"生态压力"纳入DEA分析框架中,采用兼容径向与非径向特点的EBM模型测算2006-2015年中国30个省份、三大地区的生态效率并分析其时空差异性;通过泰尔指数分解诠释中国生态效率地区差距的形成原因;从投入要素视角对中国各省份生态无效率进行分解,并以此衡量每种投入要素的贡献率;根据EBM模型计算得到投入目标值与实际值的差值来测算中国各省份的能源节约与环境污染减排潜力。结果表明:研究期内中国生态效率较低,地区差异特征明显,东部表现明显优于中西部,能源节约与环境污染减排潜力巨大;缩小东部、中部与西部三大地区之间差距和东部地区各省份内部差距是未来优化中国生态效率的关键;

Incorporating natural resource consumption and environmental pollution discharge, regarded as ueco-logical pressure,J, into the DEA analysis framework, and using the EBM model that is compatible with both ra-dial and non - radial characteristics, this paper measures the ecological efficiency of 30 provinces and three ma- jor regions in China from 2006 to 2015 and analyzes its spatial and temporal differences. The causes of the re-gional disparities of ecological efficiency are analyzed by Theil index, and the paper decomposes the ecological inefficiency of provinces in China from the perspective of input elements and measures the contribution rate of each input element; calculates the difference between input target value and the actual value of Chinas provinces so as to predict the potential of energy saving and environmental pollution reduction. The results of the study show that the ecological efficiency is relatively low and the regional differences are significant, and the East maintains much higher ecological efficiency than that of the Central and West, indicating the large potential of natural resources conservation and environmental pollution reduction ; decreasing the efficiency gap between east-em region, central region and western region and the internal efficiency gap of eastern provinces is key measure for improving China, s ecological efficiency in the future ; effective prevention and control of environmental pollu-tion emissions should be the focus of ecological and environmental protection. To achieve the target of energy conservation and emissions reduction and accelerate ecological economic transition, the government must formu-late energy conservation and emission reduction policies that adapt to the ecological technology in different regions in order to achieve the unity of “efficiency” and “fairness. ”