城市网络特征对吸引国内投资的影响——以长江中游城市群为例

Influence of urban network characteristics on attracting domestic investment:A case study of Urban Agglomeration in the Middle Reaches of Yangtze River

投资是塑造区域经济格局的重要力量之一,城市在区域网络中的地位和组织关系对投资吸引力存在重要影响。基于企业投资联系数据,本文分别构建了长江中游城市群内部城市网络和吸引区外的国内投资联系,并刻画了其网络特征和投资空间格局;采用负二项回归方法回答了“长江中游城市群城市网络特征如何影响国内其他城市对该区域投资”的这一研究问题。研究发现(:1)长江中游城市群城市网络呈现以省会城市为中心的“轴-辐”式网络空间结构,省际存在着明显的壁垒,城市网络特征各项指标的时空分布存在明显的异质性(;2)长江中游城市群吸引国内投资的来源地呈现出“东密西疏”的空间格局,投资吸纳地集中在武汉、长沙、南昌三大省会城市(;3)长江中游城市群城市网络特征和区位因素共同对城市投资吸引力存在影响,网络特征中象征城市威望权的入度和权重入度,以及象征城市控制权的出度对国内投资的吸引力起到显著正向影响,然而由于网络发育尚不成熟,网络结构指标对投资吸引力的影响尚不显著。

Investment is one of the important forces shaping the regional economic pattern.In the network society,the status and network relations of cities have a significant impact on attract-ing investment.Based on enterprise investment data,this study builds an internal urban network of Urban Agglomeration in the Middle Reaches of the Yangtze River(UAMRYR)and invest-ment links of other domestic cities to UAMRYR,and describes its network characteristics and in-vestment spatial pattern respectively.Then,using the negative binomial regression method to an-swer the question:how do the urban network characteristics of UAMRYR affect domestic invest-ment?The results reveal:First,the network of UAMRYR presents a"hub-and-spoke"network structure centered on the provincial capital city,and there are barriers between provinces.There is obvious heterogeneity in the spatial distribution of multiplex urban networks.Second,the sources of domestic investment to UAMRYR are mainly from the eastern regions and a few from the western ones.The ability to attract investment from capital cities in UAMRYR is far better than that of other cities.Third,In-degree Centrality and Weighted In-degree Centrality symbolizing urban prestige and Out-degree Centrality symbolizing urban power have a positive impact on attracting domestic investment significantly.Network structure indicators have no sig-nificant impact on absorbing investment,which may be caused by the immature network of UAMRYR.