Research on Network Structure of Beijing-Tianjin-Hebei Urban Agglomeration from the Perspective of Inter-enterprise Transaction Flow
Based on the data of the bulk commodity trading of companies, this paper integrates social network analysis, directed weighted network and QAP correlation analysis and regression analysis to reveal the spatial pat-tern and influencing factors of the network of Beijing-Tianjin-Hebei urban agglomeration. The results show that:(1) There is an obvious characteristic of multiple suppliers supplying one customer at the level of enterprise trans-action network, state-owned enterprises dominate the gathering of large amounts of resources from upstream and downstream. (2) The characteristics of urban self-supply are significant, it has formed four types of cities accord-ing to the transaction hierarchy structure:core city, sub-core city, important node city and general node city, Bei-jing plays a role of core city, sub-core cities are Tianjin and Shijiazhuang, important node cities are Cangzhou, Tangshan, Baoding, Langfang, and the rest is general node cities. (3) In the urban network, the characteristics of core are obvious, with prominent hierarchical connections of the"core-periphery"mode, and a low level of networ-king of horizontal and multi-directional connections, Beijing and Tianjin have the highest level of connection, Bei-jing and Shijiazhuang take second place. At the same time, Beijing and its surrounding cities also have close con-nection;The asymmetric connection is mainly reflected in the obvious supply of Shijiazhuang to cities in Hebei Province close to Beijing and Tianjin. In addition, Beijing and Tianjin have a close two-way trade relationship with Langfang and Baoding. (4) The urban trading network is affected by six aspects as followed, population size, eco-nomic proximity, geographical proximity and moderate technological proximity promote trade relations, while indus-trial proximity plays a significant restraining role. The provincial administrative boundaries of the Beijing-Tianjin-Hebei urban agglomeration don't significantly restrict the formation of intercity trade relations.
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万方数据
