China’s Urban Network’s Characteristics And Impact On Urban Economy

As the main place and important carrier of economic activities,the flow of factors and enterprise cooperation promote the formation of urban network.The development of cities increasingly depends on their network.Considering the themes of China’s digital economy,industrial Internet and high-quality development,in order to clarify the support pattern of technology and equipment of China’s digital economy development and industrial Internet construction,select communication equipment technology service industry network as the new perspective to build three sub networks of R&D,sales and investment according to the functional branches of enterprises.Then the sub networks are superimposed to build a comprehensive network to project China’s urban network.The characteristics,driving mechanism of forming and impact on urban economy of China’s urban network are analyzed by using social network analysis method,QAP analysis method and OLS method.The main conclusions are as follows:(1)The cohesion of China’s urban network based on the network of communication equipment technology service industry is weak and has a low degree of resource sharing.China’s urban network has a small world effect and tends to stick together evidently.It also shows distinct hierarchical characteristics of centrality.Under the joint guidance of R&D,investment and sales network,from west to East,the urban network presents a "diamond" skeleton structure with Shenzhen,Shanghai,Beijing and Chengdu as the apex,a "parallelogram" skeleton structure with Beijing,Shanghai,Shenzhen and Xi’an as the apex and an Eastern "triangle" skeleton structure with Shenzhen,Hangzhou,Beijing,Shanghai and Suzhou as the apex.The urban network is characterized by large differences in subgroup scale and uneven composition of subgroup cities.The spatial distribution of subgroup cities does not follow the first law of geography.The correlation path between subgroups is similar to the point axis model or the central peripheral model in terms of development model,but does not have the characteristics of proximity priority in terms of spatial development trend.Compared with the traditional static urban hierarchical development model constrained by geographical distance,urban network has the characteristics of dynamic development across geographical distance.(2)The difference of population scale,economic scale and geographical proximity have a positive driving effect on the formation of urban network.The difference of population size drives the formation of sales network,investment network and comprehensive network through the flow and transfer mechanism of labor force and economic activities between cities at different levels.The difference of economic scale drives the formation of sales network through the transfer mechanism of economic activities between cities with different gradients.Geographical proximity realizes the close connection between cities by meeting the accessibility conditions,so as to drive the formation of sales network and comprehensive network.The R&D capital investment difference,knowledge capital difference and industrial structure difference have a negative driving effect on the formation of urban network.The difference of R&D capital investment drives the formation of investment network and comprehensive network through the similar development status and factor supporting structure of high-tech industry and the development potential investment orientation mechanism of communication equipment technology service industry.The difference of knowledge capital drives the formation of R&D network,sales network,investment network and comprehensive network through the flow mechanism of high-tech talents between enterprises and cities with similar development levels.The difference of industrial structure drives the formation of sales network and comprehensive network through similar industrial structure and higher factor liquidity mechanism.(3)The formation of urban network has a certain impact on urban economy.From the perspective of the heterogeneity effect of different structural characteristics of urban networks,the Closeness Centrality has a significant positive effect on R&D network urban economy.That is,the stronger the accessibility of the city in the network,the more conducive to the urban economic development of the R&D network.The Degree Centrality has an impact on the urban economy of sales network and comprehensive network,but it has not shown an obvious positive role.That is,having a relationship with more cities in the network has a potential positive promotion effect on the urban economy development of the sales network and the comprehensive network.The Between Centrality has an impact on urban economy of investment network,but it has not shown an obvious positive role.That is,having a stronger ability to control resources and factors in the network has a potential positive promotion effect on the urban economy development of investment network.From the perspective of the partitioning effect of the comprehensive network structure characteristics,the urban economy in the eastern region is affected by the Degree Centrality and the Between Centrality,but it has not shown a positive promoting effect.The urban economy in the central region is affected by the Closeness Centrality and shows a positive promotion effect.At the same time,it is affected by the Degree Centrality,but it has not shown a positive promotion effect.The urban economy in Northeast region is affected by the Degree Centrality,but it has not yet reflected a positive promotion effect.