企业市场互动网络是城市网络的重要表现形式。基于全国海量工商企业信息数据库,以中国四大城市群——京津冀、长三角、珠三角和成渝为研究对象,利用大数据匹配方法,构建了城市群企业跨城投资有向加权网络,并对投资网络的空间结构与演化特征进行了分析。主要研究结论如下:2010—2019年,四大城市群投资网络规模与密度均呈现一定的增长趋势。在空间格局方面,京津冀城市群呈现以石家庄—北京—天津为中心的倒“V”型结构,长三角城市群呈现以上海为核心的多轴式发展,珠三角城市群呈菱形结构稳定发展,成渝城市群呈现出成都—重庆双核联动、成都单核辐射的空间格局。从城市层级来看,四大城市群投资网络的“核心—边缘”结构特征明显,但城市节点层级存在显著的异质性。
In recent years, urban network relationships based on factor linkages have received widespread attention from economic geographers. Based on the information database of industrial and commercial enterprises, this paper constructs a directional weighted network of investment in four major urban agglomerations in China - Beijing-Tianjin-Hebei, Yangtze River Delta, Pearl River Delta and Chengdu-Chongqing - and describes the spatial structure and evolutionary characteristics The main conclusions of the study are as follows: During the evolution process from 2010 to 2019, the scale and density of the investment networks of the four major urban agglomerations show a certain growth trend. From the perspective of spatial pattern, Beijing-Tianjin-Hebei shows a Shijiazhuang-Beijing-Tianjin From the perspective of spatial pattern, Beijing-Tianjin-Hebei shows the inverted “V”-shaped structure of Shijiazhuang-Beijing-Tianjin, the Yangtze River Delta city cluster shows a multi-axis development with Shanghai as the core, the rhombus structure of Guangzhou-Shenzhen-Zhuhai-Foshan in the Pearl River Delta city cluster has been stabilized, and the Chengdu-Chongqing city cluster shows the spatial pattern of Chengdu and Chongqing with a double core and Chengdu with a single core. In terms of city level, the investment network pattern of the four major city clusters has a clear “core-edge” structure, but there is significant heterogeneity in the level differences of city nodes.
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