基于企业间联系视角的长江经济带城市网络结构及其变化特征研究

STUDY ON THE URBAN NETWORK STRUCTURE AND ITS CHANGING CHARACTERISTICS OF THE YANGTZE RIVER ECONOMIC BELT: BASED ON INTER-FIRM LINKAGES

本文首先梳理不同种类的企业联系及其在构建城市网络中的优缺点,然后基于2013—2018年上市公司的大宗交易数据构建长江经济带的城市网络,从企业间的资金联系分析城市网络及其变化特征。研究表明:(1)2013—2018年,共有105个城市参与长江经济带城市网络的构建,资金进出量前10名城市约占资金总流量的70%。城市网络中大部分城市的资金出量高于资金入量,说明资金流具有向少数城市集聚的特征。(2)从节点数量、边数和边均强度来看,2013—2018年长江经济带城市网络的结构经历了低—高—低的发展变化。上海是城市网络的绝对核心,杭州、南京、苏州、无锡、武汉、重庆和成都等城市承担着区域中心的功能。(3)长三角城市群的网络结构相对发达,联系紧密,群内城市之间的资金总流量占长江经济带总流量的53.13%。相比之下,长江中游城市群和成渝城市群的城市网络结构欠发达。

Domestic and international studies of urban networks from the perspective of enterprises mainly build networks based on intra-firm sectoral organizational relationships, rarely focusing on the real factor flow linkages between enterprises. Therefore, this paper firstly combs different kinds of enterprise linkages and their advantages and disadvantages in constructing urban networks, and then constructs urban networks in the Yangtze River Economic Zone based on the block transactions of listed companies in 2013—2018,and analyzes urban networks and their changing characteristics from the real capital linkages among enterprises. The study shows that: 1) The capital flow has the characteristic of clustering to a few cities. 2) The structure of the urban network in the Yangtze River Delta has undergone a low-high-low development. 3)The Yangtze River Delta city cluster has a relatively developed and well-connected network structure,