Research On The Impact Of The Synergy Agglomeration Of Manufacturing And Producer Services On The Green Development Efficiency In The Triangle Of Central China

In recent years,with the acceleration of urbanization,there has been a noticeable spatial reconstruction effect.Urban agglomeration has become a powerful growth engine of regional economic and social development as a remarkable sign of the sparse performance of various factors in the region.As one of the three cross-regional urban agglomerations in the yangtze river economic belt,how to achieve efficient and coordinated development,optimize the scale and spatial distribution of industrial synergy in this region is of great significance to build the important growth poles of the country and realize green economic development.The coordinated agglomeration of manufacturing and productive services has the effect of green technological innovation and industrial structure optimization.Based on previous researches,this paper systematically summarizes the research status,basic concepts and theoretical basis of industrial synergy and green development efficiency from the perspective of manufacturing and productive services.Based on panel data of 30 cities in the Triangle of Central China from 2010 to 2020,single industry concentration level and green development efficiency level of each city are analyzed by using area entropy,E-G index,SBM model of non-expected output and Malmquist index model.The Tobit model is used to analyze the non-linear influence of manufacturing and productive services agglomeration on green development efficiency and regional differences.The results show that:(1)the overall level of manufacturing and productive services concentration in the Triangle of Central China shows an inverted "N" trend,first declining,then rising and then declining;And the level of green development in the region is in a state of growth,mainly dominated by technological progress.(2)The results of regression model show that there is a significant inverted "U"-type change in the influence of manufacturing and productive services on green development efficiency in the Triangle of Central China(3)The regression results of the sub-provinces showed that the regression results of Hubei and Hunan provinces were consistent with the whole sample of the Triangle of Central China,and the coefficient of synergistic agglomeration of manufacturing and productive services in Jiangxi Province was negative but not significant.Finally,based on the research results,the paper puts forward the corresponding policy suggestions:to promote green technology progress and improve economic sustainability;To dynamically promote the process of industrial agglomeration,play a dominant role;We should define the characteristics of regional differences and formulate scientific development strategies.