CAJ | 학술논문

城市群不仅是地理上的相邻性，更重要的是经济上的关联性，而企业是城市关联网络的“作用者”。在全球、国家和地区3个空间层面上，采用企业关联网络的分析方法，揭示了京津冀、长三角和珠三角地区的城市体系的主要异同所在。北京、上海、广州和深圳既是全国的核心城市，也分别是3个地区的“门户城市”，发挥向外连接全球经济网络和向内辐射区域腹地的“两个扇面”作用。3个地区的门户城市、主要城市和一般城市在各个层面的关联网络中都形成明显的梯度格局。在地区层面上，珠三角地区的城市体系以两个核心和单一层级（省域）为特征，显然不同于京津冀地区和长三角地区的城市体系以单一核心和两个层级（区域和省域）为特征。
성시군불부시지리상적상린성，경중요적시경제상적관련성，이기업시성시관련망락적“작용자”。재전구、국가화지구3개공간층면상，채용기업관련망락적분석방법，게시료경진기、장삼각화주삼각지구적성시체계적주요이동소재。북경、상해、엄주화심수기시전국적핵심성시，야분별시3개지구적“문호성시”，발휘향외련접전구경제망락화향내복사구역복지적“량개선면”작용。3개지구적문호성시、주요성시화일반성시재각개층면적관련망락중도형성명현적제도격국。재지구층면상，주삼각지구적성시체계이량개핵심화단일층급（성역）위특정，현연불동우경진기지구화장삼각지구적성시체계이단일핵심화량개층급（구역화성역）위특정。
An urban cluster is defined not only by the geographical proximity but also, more importantly, by economic connection of cities. Firms are the agents to interlock cities into a networ. By analyzing firm-based interlocking network, the paper identifies similarities and differences between urban clusters of nation-wide influence in the Beijing-Tianjin-Hebei Region, the Yangtze River Delta Region and the Pearl River Delta region regarding the conifguration of their interlocking networks on global,national and regional scales. Beijing, Shanghai, Guangzhou and Shenzhen are both the central cities at the national level and the gateway cities of the respective regions, playing the role of linkage between the global economic network and the regional hinterlands. The gateway cities, major cities and other cities in the three regions display the hierarchical formation on global, national and regional scales. The urban system in the Pearl River Delta region is characterized by two central cities, Guangzhou and Shenzhen, and one tier (the provincial tier), in obvious contrast with the urban systems in the Beijing-Tianjin-Hebei Region and the Yangtze River Delta Region, which are characterized by one central city (Beijing and Shanghai respectively) and two tiers (regional and provincial tiers).