The Division Of Spatial Functions Of Urban Agglomerations And Green Development: Theoretical Expansion And Re-examination

Over the past 40 years of reform and opening up,China’s economy has achieved rapid growth,but the "fast track" development model has also brought many problems,such as low resource utilization efficiency,high pollution emission and imbalance of regional development.In view of the above problems,the 14 th five year plan for national economic and social development of the People’s Republic of China and the outline of long-term objectives for 2035(hereinafter referred to as the "14th five year plan")have issued a series of policies to promote green development.In the development process of China,urban agglomeration or "metropolitan area" occupies an important position.Its total economic output,pollution emission and resource consumption are extremely huge,and its "radiation effect" and "siphon effect" on the surrounding areas can not be ignored.Therefore,urban agglomeration is the top priority for China to achieve green development.Previous studies have shown that the spatial function division of urban agglomeration,that is,the spatial industrial distribution pattern of "central cities leading production and R & D and peripheral cities leading processing and manufacturing",is an important factor to promote the economic growth of urban agglomeration,narrow the regional gap and improve labor productivity.Due to the neglect of the synergy between the relative development level of the center and peripheral cities,the existing literature can not theoretically interpret the inhibitory effect or "U" shaped influence relationship of spatial functional division on input-output rate.In addition,most literatures explore the impact mechanism of spatial functional division of labor on economy and environment from a macro perspective,which can not explain the differences of enterprise or industry green development at the micro level,and it is difficult to provide targeted suggestions for Industry and enterprise green development.Therefore,using the theory of new economic geography,this paper deeply discusses the action mechanism of spatial functional division of urban agglomeration on the green development of cities,industries and enterprises from the macro,meso and micro levels,and strictly tests the theoretical expectation in combination with urban panel data and micro data of industrial enterprises.The research content of this paper mainly includes four parts: the first part is the impact of spatial function division of urban agglomeration on urban green development.Based on the theory of new economic geography,combined with intermediate product input model and headquarters economic model,this part deduces the impact mechanism of spatial functional division of urban agglomeration on urban green development,and constructs an econometric test model for empirical analysis.The second part is the impact of spatial functional division of urban agglomeration on Regional Green coordinated development.This part further explores how spatial functional division of labor affects the green development level gap between central cities and peripheral cities in urban agglomeration,that is,regional green coordinated development.The third part analyzes the impact of spatial functional division of urban agglomeration on enterprise green development from the perspective of synergy of environmental regulation,brings environmental pollution and environmental regulation into the new economic geography model,deeply discusses the synergistic impact mechanism of environmental regulation and spatial functional division on enterprise green development,and constructs an econometric model on this basis.By matching the industrial enterprise database and enterprise pollution database,this part uses the micro data of industrial enterprises to empirically test the theoretical expectation.The fourth part analyzes the impact of spatial functional division of urban agglomeration on industrial green development from the perspective of intermediary effect of industrial association.Under the framework of new economic geography,combined with the vertical correlation theory of industry,this part discusses the impact mechanism of spatial functional division of urban agglomeration on industrial green development through the "competitive effect" and "complementary effect" between the upstream and downstream of the industrial chain,and constructs an econometric model for empirical test.Through the above research,this paper obtains the following four conclusions: first,the impact of spatial function division on the green development level of central cities and peripheral cities depends on the relative scale of central cities and peripheral cities.When the relative scale of center periphery crosses the threshold,the spatial function division will improve the green development level of central cities and peripheral cities.Second,the improvement of spatial functional division and relative scale of urban agglomeration has a positive impact on Regional Green coordinated development,but the improvement of relative scale will also reduce the positive impact of spatial functional division on Regional Green coordinated development.Third,the impact of spatial functional division on the green development of enterprises in central cities depends on the relative environmental regulation level between central cities and peripheral cities.When the relative environmental regulation level is lower than the optimal level,spatial functional division will promote the green development of enterprises in central cities.Fourth,the division of spatial functions will not only directly affect the green development of the industry,but also affect the green development of the industry through the industrial "competitive effect" and "complementary effect" formed by the local and surrounding cities in the urban agglomeration.In view of the above conclusions,this paper puts forward the following policy suggestions: first,we should ensure that the central cities in the urban agglomeration have a relatively high scale,so as to offset the costs of enterprises running factories in different places and product transportation with the benefits of scale effect,so as to improve the input-output rate of resources.Second,the government should increase R & D subsidies to central cities.Third,the formulation of regional environmental regulation policies should fully consider the relative level of different regions.Fourth,the government should ensure fair competition and effective cooperation among regional industries.