长江经济带城市绿色发展及影响因素分析

Analysis of Urban Green Development and Influencing Factors in Yangtze River Economic Belt

文章基于长江经济带九省二市的105个地级市的面板数据,运用非期望SBM模型对各城市绿色效率进行了测算,并利用面板Tobit模型探索了绿色效率的影响因素。结果表明:长江经济带城市绿色发展较好,呈现"V"型变化趋势;各地区绿色发展水平差距显著,下游地区、上游地区、中游地区绿色水平依次降低,其中武汉城市群、滇中城市群、长三角城市群是促进城市绿色发展的三大增长极;绿色发展效率与经济发展水平表现为"U"型关系,大部分城市位于"U"型曲线的上升一方,对外开放、科技投入、经济集聚和环境规制有助于绿色发展效率的提升,而产业结构则阻碍了城市绿色发展。

Based on the panel data of 105 prefecture-level cities in nine provinces and two cities on the Yangtze River Economic Belt, this paper uses the non-expected SBM model to measure the green efficiency of each city, and utilizes the panel Tobit model to explore the influencing factors of green efficiency. The results show that the urban green development of the Yangtze River Economic Belt is better, presenting a V-type change trend;the gap between the green development levels in each region is significant, and the green levels in the downstream, upstream and midstream areas are decreasing successively, among which Wuhan city group, central Yunnan city group and Yangtze River Delta urban agglomerations are three poles of growth;the relationship between green development efficiency and economic development level is U-shaped, and most cities are on the rising side of the U-shaped curve;opening up to the outside world, investment in science and technology, economic agglomeration and environmental regulation contribute to the improvement of green development efficiency, while industrial structure hindering the green development of cities.