| As a major contributor to the national economy,the important position of the county economy cannot be ignored.Chengdu-Chongqing urban agglomeration is one of the cities with the highest density and population density in western China.The problem of economic differences between counties is more prominent.It is of great practical significance to explore the spatial differences and driving mechanisms of county-level economy within Chengdu-Chongqing urban agglomeration.The implementation of the Chengdu-Chongqing urban agglomeration strategy has brought about a certain spatial pattern evolution and spatial correlation to the interregional economic development.In order to find out the short-term and short-term before and after the official signing of the Chengdu-Chongqing urban agglomeration strategic cooperation agreement between Sichuan and Chongqing in 2007 In the medium and long-term time horizon,the evolution characteristics of the county economy within the urban agglomeration and the mechanism of the influencing factors,this paper uses exploratory spatial data analysis(ESDA)and geographic weighted regression(GWR),using SPSS,GeoDa and ArcGIS software,Quantitative measurement analysis and modeling analysis of 121 county-level economic differences and causes of Chengdu-Chongqing urban agglomeration in 2000,2005,2010 and 2015.Firstly,through the exploratory spatial data analysis,the spatial correlation of the economic activities of each county and the non-stationary nature of the differential evolution are measured,and the characteristics of time and space changes are visualized.The results of spatial difference research show that after 15 years of development,the economic development level of the districts and counties of Chengdu-Chongqing urban agglomeration has been significantly improved,but it is in a non-equilibrium state,and the economic development difference in the region is more obvious,forming a spatial dual structure;the relative development has obvious zones.Sexuality gradually evolved into a “axial-periphery” spatial model with Chongqing as the core,Chengmianle City Belt and Riverside City Belt gradually decreasing;the economic development between counties is positively spatially correlated,and the economic development of each district and county the relative difference in levels has a decreasing trend.Based on the analysis of economic spatial differences,this paper conducts geographic weighted regression(GWR)and ordinary least squares regression(OLS)on the main factors affecting its economic development.The model comparison shows that the geographical weighted regression model has obvious fitting effect.It is better than OLS,and the degree of influence of various factors on economic development corresponds to a regression coefficient in each district and county,which is more accurate and scientific.The GWR results show that the spatial pattern of various influencing factors has undergone restructuring of different structures since 2000.Per capita fixed asset investment,total retail sales of per capita social consumer goods,and per capita fiscal expenditure have positive effects on economic development,and consumption levels have contributed to economic development.The impact is the biggest,while the proportion of the added value of the primary industry is negative,and all the influencing factors have obvious spatial clustering,and are regularly distributed in strips and rings.Based on the above comprehensive analysis of the spatial differences in the economic development of Chengdu-Chongqing urban agglomeration,the author objectively reflects the non-stationary and influential factors of the economic development of Chengdu-Chongqing urban agglomeration on the basis of spatial heterogeneity.On this basis,the regional economic development of ChengduChongqing urban agglomeration has put forward relevant suggestions,and it is hoped that it will help to promote the balanced and coordinated development of ChengduChongqing urban agglomeration. |
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