成渝经济圈生态效率时空动态演变及其影响因素（英文）

为了响应国家十四五规划，更好地探索促进区域协调绿色发展的新战略，本文采用super-SBM模型和马尔可夫链对成渝经济圈2004–2018年的生态效率值进行了测算与时序分析，同时，利用地理加权回归模型对生态效率进行了空间分析。虽然成渝经济圈生态效率在研究期间有所提高，但其经济发展仍然是生态无效的，这意味着成渝迫切需要提高资源利用效率，促进技术创新。在研究期间，成渝经济圈的生态效率的演变呈现为“π”字形状，并伴随着“俱乐部趋同”的现象，此现象表明生态效率有保持原状的强烈趋势，说明生态效率缺乏足够的改善动力，因此很难实现跨越式转移。从空间上看，生态效率从西北向东南呈高–低–高效率分布，生态效率的时空差异缩小，但集聚效应相对较弱且呈现两极分化趋势。进一步的研究表明，城镇化发展水平、对外开放水平、技术水平、环境规制和产业结构高级化是导致生态效率空间差异的原因。成渝经济圈应针对各自弱点相应采取改善措施提高生态效率，从而促进整个区域的绿色发展。

Spatio-temporal Dynamic Evolution and the Factors Impacting Eco-efficiency in Chengdu-Chongqing Economic Circle

In response to the 14th National Five-year Plan of China and to better explore new strategies for promoting regional coordinated green development, the eco-efficiency values of Chengdu-Chongqing Economic Circle and the corresponding temporal analysis from 2004 to 2018 were assessed in this paper using the super-SBM model and Markov chain. Meanwhile, the spatial analysis of eco-efficiency was conducted by a geographically weighted regression model. Although eco-efficiency has risen at an increasing rate, the economic development of Chengdu-Chongqing Economic Circle was still ecologically ineffective. This means there is an urgent need to improve the efficiency of resource utilization and promote technological innovation. During the study period, the evolution of the eco-efficiency presented as a “π” shape, and was accompanied by the phenomenon of “club convergence”. There was also a strong tendency for eco-efficiency to maintain the original status quo, which indicates that it lacked sufficient momentum for improvement, so it was difficult to achieve a leapfrog transfer. Spatially, the eco-efficiency was distributed from northwest to southeast in a high-low-high manner. The spatial-temporal differences of eco-efficiency narrowed but the effect of agglomeration was relatively weak and there was a polarization trend. Further investigation suggests that the differences in the development level of urbanization, opening, technology, environmental regulation and advancement of industrial structure led to the spatial differences of eco-efficiency. Each city in the Economic Circle should make every effort to improve eco-efficiency accordingly, and thus to promote the green development of the whole region, so as to lay a foundation for driving the green and coordinated development of the central and western regions.