成渝地区双城经济圈高质量一体化水平及时空特征OACHSSCDCSTPCD

An evaluation index system for high-quality integration of the Chengdu-Chongqing Twin-City Economic Circle was constructed based on seven dimensions including economic synergy,infrastructure interconnection,innovation synergy,etc,and the de-velopment level from 2010 to 2020 was measured by using the entropy method.Then,social network analysis and Dagum Gini coefficient were used to identify the spatiotemporal characteristics of each city and region in the interior,and QAP regression analysis was used to analyze the internal driving effect and characteristics of each dimension on the overall high-quality integration development.The results showed that:① The majority of cities with low and medium-low levels of high-quality integration development were located in the Chengdu-Chongqing Twin-City Economic Circle,the structure of the high-quality integration spatial linkage network was fragile,the cities were not closely linked,and the core and peripheral zones generally maintained the distribution of the"top six",with different roles and statuses for each city in the network.②The level of high-quality integration among the regions within the Chengdu-Chongqing Twin-City Economic Circle was,in descending order,Chongqing,Chengdu Plain,Southern Sichuan,and Northeastern Si-chuan,and the spatial differences in high-quality integration development were shrinking and mainly came from inter-regional differ-ences.③The overall high-quality integration of the Chengdu-Chongqing Twin-City Economic Circle and the development level of each sub-dimension had gradually increased but the development level was low,and except for the ecological synergy,all the other fac-tors had positively driven the high-quality integration development.