Research On The Differences Of Urban Scale Structure,Industrial Structure And Economic Growth Of Urban Agglomeration

The Beijing-Tianjin-Hebei urban agglomeration,the Yangtze River Delta urban agglomeration and the Pearl River Delta urban agglomeration are the most powerful urban agglomerations in China.They are an important growth pole for China's economic development,and its economy can achieve better development.Based on the urban scale structure and industrial structure within the urban agglomeration,this paper studies the impact of different urban scale structures and industrial structures within the urban agglomeration on economic growth.Using the qualitative analysis method of theoretical deduction,the paper analyzes the mechanism of the influence of urban scale structure and industrial structure on the economic growth of urban agglomerations.Through the analysis and analysis of the development stage of urban agglomerations,it is found that in the process of urban agglomeration development,the diffusion effect It is very important,and the urban scale structure and industrial structure within the urban agglomeration will affect the diffusion effect,which will affect the economic growth and development of the urban agglomeration.If there is a large gap between urban scales and excessive industrial structure within the urban agglomeration,the diffusion effect will be weakened,which will be detrimental to the economic growth of the urban agglomeration.Conversely,if the scale structure and industrial structure of each city within the urban agglomeration are reasonable,the city will be promoted.Group economic growth.Through the construction of indicators to measure the urban scale structure and industrial structure within the urban agglomeration,the economic impact of urban scale structure and industrial structure on urban agglomerations is quantitatively analyzed,and the influence of urban scale structure and industrial structure on different urban groups is analyzed through horizontal comparison.On the basis of the city's first degree,this paper constructs the core city's first degree that can better reflect the actual development characteristics of the urban agglomeration,and constructs the industrialstructure coefficient of variation,which is used to measure the industrial structure difference of each city in the urban agglomeration;The Findel Index represents the changes in the size structure of the urban agglomeration.The analysis of the empirical results shows that the urban scale structure and industrial structure within the urban agglomeration have different impacts on different urban agglomerations,which in turn makes the economic growth of different urban agglomerations different.In the Beijing-Tianjin-Hebei urban agglomeration,the difference in industrial structure and the increase in the Herfindahl index are beneficial to the economic growth of the urban agglomeration,while the increase in the first position of the core city is not conducive to the growth of the urban economy.As the Beijing-Tianjin-Hebei urban agglomeration presents a dual-core and fault-development model,the widening of industrial structure between cities actually promotes the division of labor between cities and breaks the problem of industrial isomorphism,thus promoting economic growth;Increasing the intensification of faults,making the city's size distribution discontinuous,the greater the gap in urban functions,the more unfavorable the division of labor between cities;in the context of the stable economic scale of Beijing and Tianjin,the rise of the Herfindahl index reflects the large and medium-sized The economic development of cities,the scale of these cities will make the city's scale structure tend to be reasonable and continuous,thus promoting the economic development of urban agglomerations.The Pearl River Delta urban agglomeration is a development model of dual-core faults.There are two core cities within the urban agglomeration,which drive the development of surrounding cities.There are no sub-central cities,but there are several large and medium-sized cities,so the economic linkages between cities exist.The difference in industrial structure will not be conducive to urban cooperation,which is not conducive to the economic growth of urban agglomerations.At the same time,there is also a phenomenon that the increase in the first position of core cities is not conducive to economic growth.The Yangtze River Delta urban agglomeration grows in the form of a center and multiple sub-centers.Under such a development model,the difference in industrial structure is not conducive to inter-city cooperation.At the same time,the rise of the Herfindahl index is not conducive to the economic growth of urban agglomerations.