环境约束下长江经济带全要素能源效率的时空分异研究——基于超效率DEA模型和ML指数法

基于超效率DEA模型和ML指数法,考察长江经济带1999~2013年全要素能源效率。实证研究结果显示:研究期内,环境约束下的长江经济带全要素能源效率年均下降2.9%,而不考虑环境因素的全要素能源效率年均下降幅度仅为0.4%,污染是导致能源效率损失的重要因素;长江经济带整体层面全要素能源效率的发展演变基本呈"双峰一谷"的"M"形分布,表现为两个"上升—下降"周期,而省际和上中下游全要素能源效率的演变特征迥异;从空间差异看,省际全要素能源效率差异远远大于上中下游差异,但近年来这种差异均有不同程度的缩小。未来长江经济带发展必须践行生态文明发展战略,保证发展的可持续性,同时加强能源、环保等领域的合作,促进长江经济带全要素能源效率发展的协同进步。

RESEARCH ON TIME AND SPACE DISPARITIES OF TOTAL FACTOR ENERGY EFFICIENCY IN THE YANGTZE RIVER ECONOMIC BELT UNDER THE CONSTRAINED ENVIRONMENT

Based on super-efficiency DEA and ML index, we estimated the ML index of total factor energy efficiency and analyzed its temporal and spatial disparities in the Yangtze River Economic Belt from 1999 to 2013. According to the results, total factor energy efficiency of the Yangtze River economic belt declined 2.9% annually from 1999 to 2013, while the decline value regardless of environment is 0.4%. This demonstrates that environmental pollution is an important factor leading to the loss of energy efficiency. In the aspect of time, the overall level of total factor energy efficiency in the Yangtze River economic belt had a M-shaped locus with bimodal distribution, that is, it had two periods that include a "up-down" paths respectively. But the evolution features of inter-provincial are quite different from that in Yangtze River from upstream to downstream. Inter-provincial disparity of total factor energy efficiency is much larger than that among upstream, midstream and downstream of the Yangtze River. These disparities have a tendency to decrease in recent years with varying degrees. In the future,ecological civilization development strategy is needed to ensure sustainable development. Meanwhile, governments in the Yangtze River economic belt need to strengthen their cooperation in energy, environment protection and other fields to promote the development of total factor energy efficiency progress collaboratively.