统计研究

基于2006—2018年长江三角洲地区城市数据，本文构建经济高质量发展评价指标体系，采用修正的引力模型识别长三角城市间经济高质量发展的空间关联关系，进而借助社会网络分析方法测度区域经济一体化水平，并运用二次指派程序分别从内外源角度考察区域经济一体化的驱动机制。研究发现，首先，长三角地区的经济高质量发展具有显著空间非均衡特征，表现为东部发展水平较高而西部发展水平较低，中部发展水平较高而南北发展水平较低，上海、南京、苏州、杭州扮演着经济高质量发展的“领头羊”角色。其次，长三角地区城市经济高质量发展呈现多线程的复杂网络结构形态，但是空间关联关系并不紧密，网络结构较为脆弱，集聚效应并不显著，高质量发展标准下的经济一体化进程仍处于初级阶段。最后，从内源视角看，绿色发展、协调发展和创新发展是长三角区域经济一体化的主要驱动力，开放发展和共享发展的推动作用有限，未来应在扩大对外开放的同时，加快公共服务便利共享，使经济一体化发展成果更多更公平惠及全体人民；从外源视角看，金融发展和人口流动是长三角区域经济一体化的主要驱动力，经济波动和社会消费的影响程度相对较低，应进一步完善商品市场一体化建设，推进经济规划的对接与协同。

Based on the data of cities in the Yangtze River Delta from 2006 to 2018, this paper constructs the evaluation index system of high-quality economic development, uses the modified gravity model to identify the spatial correlation of high-quality economic development among cities in the Yangtze River Delta, then measures the level of regional economic integration with social network analysis, and uses the quadratic assignment procedure to investigate the driving mechanism of regional economic integration from the perspective of endogenous and exogenous perspectives. The research finds that: The high-quality economic development in the Yangtze River Delta has significant spatial inequality, which is manifested in the higher development level in the east and the lower development level in the west, the higher development level in the middle and the lower development level in the north and south. Shanghai,Nanjing, Suzhou and Hangzhou play the role of “leaders” in high-quality economic development. The high-quality economic development of the Yangtze River Delta presents a multi-threaded complex network structure, but the spatial correlation is sparse, the network structure is fragile, the agglomeration effect is not significant, and the process of economic integration under the standard of high-quality development is still in the primary stage. From the endogenous perspective, green development, coordinated development and innovative development are the main endogenous driving factors of regional economic integration in the Yangtze River Delta. Open development and shared development can only play a limited role. In the future, while opening wider to the world, we should accelerate the convenience and sharing of public services so that the achievements of economic integration can be shared by all people more equally. From the exogenous perspective, financial development and population mobility are the main driving factors of economic integration in the Yangtze River Delta, and the impact of economic fluctuations and social consumption is relatively low. We should further improve the integration of commodity markets and promote the coordination of economic planning.