Research On The Spatial And Temporal Evolution Of County Economy In Sichuan Province Based On ESTDA

County is the link between city and countryside,county economy is an indispensable part of our national economy,the quality of county economy determines the quality of our national economy.Therefore,vigorously developing county economy is the fundamental way to narrow the gap between urban and rural areas and realize a well-off society in an all-round way.Sichuan Province occupies an important position in the western part of China.The county area of Sichuan Province is used as a research unit to reveal the temporal and spatial evolution of the county economy,which not only fills the gap in the spatial and temporal evolution of the county economy in Sichuan,but also the policy formulation of county economic development in Sichuan Province.Provide certain reference to promote county economic development,help to eliminate national povertystricken counties at an early date,and be of great significance to county-level economic development in the entire western region.This paper mainly uses 181 counties in Sichuan Province as research units to explore the spatial and temporal dynamics of county economy in Sichuan Province from 2005 to 2016.Firstly,quantitative analysis of Sichuan's overall economic development trend is carried out from three aspects: regional GDP,per capita GDP and three industrial structure changes.Secondly,a more detailed qualitative and quantitative analysis was carried out from the three levels of county economic development level,development speed and industrial structure.In order to avoid the one-sidedness of the research results of single indicators and to further understand the temporal and spatial evolution of county economy in Sichuan Province,this paper selects 15 three-level indicators,establishes a comprehensive evaluation index system,and combines GIS,OpenGeoda and other related software technologies to the county economy of Sichuan Province.Spatial exploration analysis is carried out to analyze the spatial correlation between the target unit and the adjacent unit from the global and local perspectives.The results show that:(1)Sichuan's economic aggregate and actual per capita GDP continue to grow,but the gap between urban and rural areas has increased year by year.(2)There are more counties in the low-speed development of the economy,and the speed difference is also large.At the same time,the county with low economic development is concentrated in the economic zone of northwest Sichuan.(3)The county economy has a significant spatial positive correlation,showing a strong agglomeration space pattern,and the spatial difference in the overall change is to shrink-large-large.(4)The northwestern part of the Sichuan Economic Zone,the north-central Sichuan,and the southwestern Sichuan have a more volatile local spatial structure,and the southern Sichuan economic zone tends to have a more stable local spatial structure.(5)Most county areas have greater stability in the local spatial dependence direction,and some county areas in Aba and Liangshan Prefecture have greater volatility in the spatial dependence direction.(6)The proportion of counties with synergistic growth in Sichuan Province is above 43%,indicating that the evolution of the spatial pattern of county economies has strong spatial integration.(7)Sichuan Province's county economy has strong spatial cohesion,and there are agglomerations of low and high values.The spatial status of each county is relatively stable,with certain path dependence or locking characteristics.