长江经济带生态环境保护与经济高质量发展的耦合协调关系及其影响因素

以长江经济带为研究地区构建生态环境保护与经济高质量评价指标体系。利用耦合协调模型、Dagum基尼系数、核密度和固定效应模型探究耦合协调度的时空特征、区域差异、动态演进特征及影响因素。结果表明：1）2008-2020年两系统发展指数均呈上升趋势。2）耦合协调度仍处于较低水平，具体表现为沿海下游省市>中心省市>上游省市。3）区域间差异是总体差异的主要来源，并且绝对差异缩小，梯度效应减弱。4）经济发展水平、人口聚集程度、产业结构升级和城镇化水平对耦合协调发展具有显著影响。

The Coupling and Coordination of Ecological Environmental Protection and High Quality Economic Development in the Yangtze River Economic Zone and Its Influencing Factors

The Yangtze River Economic Belt was used as the study area to construct an index system for evaluating ecological environmental protection and economic high quality. The coupled coordination model, Dagum Gini coefficient, kernel density and fixed effect model were used to explore the spatial and temporal characteristics, regional differences, dynamic evolutionary characteristics and influencing factors of the coupled coordination degree.The results are as follows. Both system development indices show an increasing trend from 2008 to 2020.The degree of coupling coordination is still at a low level, which is shown as coastal downstream provinces and cities > central provinces and cities > upstream provinces and cities.Interregional variation is the main source of overall variation, and absolute differences narrow and the gradient effect diminishes.The level of economic development, the degree of population aggregation, industrial structure upgrading and urbanization have a significant impact on the coupled and coordinated development.