摘要
城市功能联系网络的空间外部性对解释区际互联互助、推进区域经济协调发展具有重要意义。文章以长江经济带110个地级及以上城市为研究对象,探究产业联系下的城市功能网络结构及其协调发展空间效应:首先,根据城市产业分类及功能特性构建了城市功能结构体系;其次,基于产业联系角度,运用修正引力模型测算城市功能网络联系强度,并借助重尾分级法确定网络层级结构;再次,运用社会网络分析法从网络空间分布结构、网络密度效率和网络边界效应三个层面剖析各类功能网络结构特征;最后,构建空间计量模型检验城市功能联系网络对区域经济协调发展的空间效应。研究发现:全域内各类城市功能网络结构形态存在差异,流通和公共服务功能网络呈跳跃式交织联结分布,其余三类功能网络均呈“东密西疏”梯度化递减的网状分布;全域内各类功能联系网络具有相似的空间分异性,上游以成渝双核引擎式联动发展,中游形成以省会城市为核心的“三足鼎立式”轮轴辐射结构,下游呈“一核多中心式”扁平化结构;城市综合功能网络对区域经济协调存在正向空间溢出效应,且这种空间效应存在区域异质性;产业联系的分功能网络对区域经济协调的作用程度存在差异,生产功能溢出效应最大,流通和公共服务功能的溢出效应尚不显著;在城市规模异质性条件下,大城市间功能联系网络呈负向溢出,中小城市功能网络呈正向溢出。为此,提出以下政策建议:着力优化营商环境,增强城市功能网络连通性;夯实交通信息基础设施建设,释放功能网络协调效应;优化产业分工协作体系,避免城市功能定位同质化。创新之处:从网络外部性视角,分别从区域异质性、功能异质性和规模异质性维度探究城市功能网络对区域经济协调的空间效应。
The spatial externality of urban functional connection network is of great significance to explain interregional interconnection and mutual assistance and promote the coordinated development of regional economy.Taking 110 cities at prefecture level and above in the Yangtze River economic belt as the research object,this paper explores the urban functional network structure and its spatial effect of coordinated development under industrial connection:firstly,the urban functional structure system is constructed according to the urban industrial classification and functional characteristics;secondly,based on the perspective of industrial connection,the connection strength of urban functional network is calculated by using the modified gravity model,and the network hierarchy is determined by using the heavy tail classification method;thirdly,the social network analysis method is used to analyze the structural characteristics of various functional networks from three aspects:network spatial distribution structure,network density efficiency and network boundary effect;finally,a spatial econometric model is constructed to test the spatial effect of urban functional connection network on the coordinated development of regional economy.It is found that:1)There are differences in the structural forms of various urban functional networks in the whole region:the functional network of circulation and public service are distributed in a jumping intertwined connection,and the other three types of functional networks are distributed in a gradient decreasing network of“dense in the East and sparse in the west”.2)All kinds of functional networks in the whole region have similar spatial differentiation:the upstream is developed in the form of Chengdu-Chongqing dual core engine;in the middle reaches,a“three pillars”axle radiation structure with the provincial capital city as the core is formed;the downstream is a flat structure with one core and multiple centers.3)Urban comprehensive function network has positive spatial spillover effect on regional economic coordination,and this spatial effect has regional heterogeneity.4)The sub functional networks of industrial linkages have different effects on regional economic coordination:the spillover effect of production function is the largest,and the spillover effect of circulation and public service function is not significant.5)Under the condition of urban scale heterogeneity,the functional connection network between big cities shows negative spillover,and the functional network of small and medium-sized cities shows positive spillover.Therefore,the following policy suggestions are put forward:striving to optimize the business environment to enhance the connectivity of urban functional networks;consolidating the construction of traffic information infrastructure to release the coordination effect of functional network;optimizing the industrial division and cooperation system to avoid homogenization of urban functional positioning.Innovation:from the perspective of network externality,this paper explores the spatial effect of urban functional network on regional economic coordination based on the dimensions of regional heterogeneity,functional heterogeneity and scale heterogeneity.
作者
白永亮
康振楠
BAI Yongliang;KANG Zhennan(School of Economics and Management,China University of Geosciences,Wuhan 430074,P.R.China;Soft Science Research Base for Monitoring and Analysis of Regional Innovation Capability in Hubei Province,Wuhan 430074,P.R.China)
出处
《重庆大学学报（社会科学版）》
CSSCI
北大核心
2023年第2期16-32,共17页
Journal of Chongqing University(Social Science Edition)
基金
国家社会科学基金项目“长江经济带节点城市的要素集聚功能研究”(16BGL199)。
关键词
城市功能联系网络
区域经济协调发展
空间效应
产业联系
长江经济带
urban functional contact network
coordinated development of regional economy
spatial effect
industrial linkages
the Yangtze River Economic Belt
