金融集聚与城市绿色发展的时空耦合分析——以长三角城市群为例

Analysis on the Spatial-temporal Coupling Characteristics of Financial Agglomeration and Urban Green Development-Taking the Yangtze River Delta Urban Agglomeration as an Example

基于2011-2021年长三角27个城市的面板数据,利用区位熵和超效率SBM模型测算长三角各城市金融集聚和城市绿色发展水平,构建两系统耦合协调度模型,分析两系统之间时空耦合特征。结果表明,长三角城市群金融集聚水平呈稳定上升态势,且差距逐渐缩小;城市绿色发展水平空间分布不均衡,随时间推移城市间差距愈发显著;两系统之间呈现高耦合、低协调的局面,形成了以上海、南京、杭州、合肥为高值中心,由高到低向四周扩散的发展格局,两系统协调值差异呈现先减后增的“U”型的趋势,且差异愈发明显。因此,需要加强长三角中心城市与周边城市信息互通,充分发挥中心城市的空间溢出效应带动周边区域发展,进而推动长三角城市群两系统协调发展。

Based on the panel data of 27 cities in the Yangtze River Delta from 2011 to 2021,this paper applied location entropy and super-efficiency SBM model to estimate the level of financial agglomeration and urban green development of each city in the Yangtze River Delta,constructs a coupling coordination degree model of the two systems,and analyzes the spatial-temporal coupling characteristics between the two systems.The research findings show that the financial agglomeration level has been increasing over time,with the gap gradually narrowing.The spatial distribution of urban green development levels is uneven,and the gap between cities becomes increasingly prominent with the passage of time.The two systems exhibit high coupling and low coordination forming Shanghai,Nanjing,Hangzhou and Hefei as high-value centers,spreading from high to low to all around,and spreading from high to low to the surroundings.The difference in coordination value shows a"U"-shaped trend,first decreasing and then increasing,and the differences between cities have become more apparent.Therefore,it is necessary to strengthen the information exchange between the central city of the Yangtze River Delta and the surrounding cities,give full play to the spatial spillover effect of the central city to drive the development of the surrounding areas,and thereby promote the coordinated development of the two systems of the Yangtze River Delta urban agglomeration.