Research On The Spatial And Temporal Differentiatior And Influencing Factors Of Urban G Reen Total Factor Productivity In The Grand Canal Cultural Belt

One of the trends in the construction of the Grand Canal Cultural Belt is to integrate its overall construction into the ecological protection and high-quality economic development strategies of urban agglomerations such as Beijing-Tianjin-Hebei,the Yangtze River Economic Belt,the integration of the Yangtze River Delta and the Yellow River Basin.It can be seen that promoting the high-quality economic development of the Grand Canal Cultural Belt will help achieve coordinated high-quality growth of my country’s regional economy.However,with the rapid economic development of the Grand Canal Cultural Belt,the existing industrial structure and ecological environment problems have become increasingly prominent,which has had a greater impact on the growth of green total factor productivity,which in turn has an important impact on the transformation of the economic development model.Therefore,the measurement of urban green total factor productivity（GTFP）can help to quantify the status quo of urban green economic development in the Grand Canal Cultural Belt,clarify the spatial and temporal differentiation characteristics of urban green economic development,and better understand the economic factors and innovative technology space for free flow between cities.The role of spillover effects on each city’s own green economic growth.It can also further break the market barriers of economic development between cities,comprehensively enhance the spatial spillover effect of green total factor productivity,and achieve sustainable development of regional economy and ecological environment.This paper uses the Malmquist-Linebarger productivity index method of non-radial and non-angular SBM directional distance function to calculate the green total factor productivity index and decomposition index of 86 prefecture-level cities in the Grand Canal Cultural Belt from 2009 to 2018;scale analysis of the spatial and temporal trends and spatial heterogeneity of urban green total factor productivity in the Grand Canal Cultural Belt;finally,on the basis of the spatial autocorrelation test,a spatial econometric model is used to empirically analyze the influencing factors of the urban green total factor productivity in the Grand Canal Cultural Belt.The mechanism of action and the effect of its spatial spillover effect.The research results show that:（1）From 2009 to 2018,the green total factor productivity of the Grand Canal Cultural Belt showed an overall growth trend,but the green total factor productivity of some cities with small economies and slow industrial structure transformation showed a downward trend,indicating that the quality of the green economy in the Grand Canal Cultural Belt is high and sustainable.However,the growth of green total factor productivity is not balanced in space,that is,the development of regional green economy is not coordinated;（2）The driving force for the growth of green total factor productivity in the Grand Canal Cultural Belt comes from technological progress,and the decline of the technical efficiency index inhibits the growth of green total factor productivity;（3）The green total factor productivity of the Grand Canal Cultural.Belt has the characteristics of spatial autocorrelation and spatial agglomeration,that is,the spatial correlation between cities will cause the growth of green total factor productivity to have a spatial spillover effect,thereby improving the green total factor productivity of surrounding cities.However,there is still the problem of insufficient spatial spillover effect of green total factor productivity,which makes it present a "dumbbell-shaped" spatial pattern of"hot spot-cold spot-hot spot";（4）At the overall level,factors such as industrial structure,environmental regulation,and energy consumption have an inhibitory effect on the growth of green total factor productivity in cities along the Grand Canal Cultural Belt.The growth of total factor productivity with urban green has a catalytic effect.Among them,the industrial structure has the greatest impact on the growth of green total factor productivity in the cities of the Grand Canal Cultural Belt.The main reason is that the positive effect of regional technological innovation on the growth of green total factor productivity cannot fully compensate for the negative effect of industrial pollution on the growth of green total factor productivity.Inhibit the growth of green total factor productivity in cities along the Grand Canal Cultural Belt;（5）From the perspective of divided regions,the effect of the factors affecting the growth of green total factor productivity is the same as that of the overall level,indicating that the results of the spatial econometric model are significant and stable.In addition,industrial structure,government scale and degree of openness are the main influencing factors for the spatial heterogeneity of regional green total factor productivity growth,of which industrial structure has the most significant effect.