长江经济带经济联系空间格局及其经济一体化趋势

Analysis of Economic and Spatial Linkage and Economic Integration Trend in Yangtze River Economic Belt from Social Network Analysis Perspective

在修正经济联系引力模型基础上,采用社会网络分析方法对2013年长江经济带经济联系空间格局及一体化趋势进行分析。结果表明:长江经济带经济联系网络形成以中下游城市群和上游城市群为核心的两大板块,区域内交通网络体系的完善是促进中下游经济联系的主要原因之一;"核心—边缘"结构分析显示长江经济带形成明显的核心边缘结构,且核心区与边缘区网络密度差异较大,上海、武汉、长沙、重庆、成都等城市成为经济联系网络中重要的中介城市,总体上长江经济带经济联系网络呈现"一轴线、两板块、多中心"的经济联系格局;长三角城市群、长江中游城市群和成渝城市群在经济联系网络模式上分别呈现出"多中心紧凑模式、多中心松散模式、双核极化模式",表明中下游区域以城市群为主体,中介城市为对接点的经济联系一体化趋势正在形成,加强与成渝城市群为核心的上游城市群之间的经济联系是实现长江经济带一体化发展的关键。

The development of the Yangtze River Economic Belt is a key method to realize the strategy of ＂One Belt One Road＂, and studying on the spatial structure of the economic linkage is helpful to promote the development among East- Middle-West regions. Combined revised gravity model with social network analysis, this paper analyzes the spatial pattern and integration trend of economic linkage in Yangtze River Economic Belt in 2013. The results show that the economic linkage network of the Yangtze River Economic Belt forms two plates between the middle/lower reaches urban agglomeration and the upstream urban agglomeration, and developed transportation network improves the economic linkage between the middle and lower reaches urban agglomeration. Meanwhile, the ＂core-periphery＂ structure analysis shows that the Yangtze River Economic Belt has obvious core periphery structure, and the density between core area and periphery area is quite different. In the Yangtze River Economic Belt, Shanghai, Wuhan, Changsha, Chongqing and Chengdu become important mediating cities in the economic linkage network. We also find that a special spatial pattern of ＂one axis, two plates, multi center＂ is developed in the economic linkage network of Yangtze River Economic Belt. Finally, economic integration of the middle and lower reaches urban agglomeration was emerged by consisting of urban agglomerations and key intermediary cities. It is beneficial from multi-center compact mode and multi-center loose mode between Yangtze River Delta urban agglomeration and the middle reaches urban agglomeration. The important way of enhancing economic integration in Yangtze River Economic Belt is to strengthen the economic linkage between middle/ lower reaches urban agglomeration and the upstream urban agglomeration, which has a ＂dual-core polarization mode＂.