| The report of the 19 th National Congress of the Communist Party of China emphasized that to accelerate the construction of a modern economic system and optimize the industrial structure,it is necessary to accelerate the development level of the modern service industry,especially the development of the producer service industry.Knowledge-intensive service industry is an industry developed and formed by integrating high-knowledge and high-tech elements in the digital information age.The guidance clarifies the development direction of my country’s manufacturing industry upgrading,based on the agglomeration of knowledge-intensive service industries,to improve the technological content of manufacturing products and improve the competitiveness of the manufacturing industry.Therefore,this paper takes China’s manufacturing industry as the research object,and deeply explores the impact and practical significance of knowledge-intensive service industry agglomeration on the upgrading of manufacturing industry.Through the literature research method,this paper clarifies the concept of knowledge-intensive service industry and its agglomeration model,defines the concept of manufacturing industry upgrading and its measurement method,and finds that in the existing research,knowledge-intensive service industry agglomeration model has an impact on the manufacturing industry.The effects of escalation are poorly studied.This paper expounds the impact of the agglomeration effect on the upgrading of the manufacturing industry from two aspects: the specialized agglomeration and the diversified agglomeration of the knowledge-intensive service industry.On this basis,the panel data of 30 provinces across the country from 2010 to 2019 were collected,and the specialization agglomeration index and diversification agglomeration index of knowledge-intensive service industries were calculated as the core explanatory variables to empirically study the effect of knowledge-intensive service industry agglomeration mode on manufacturing The direct effect of industrial upgrading;secondly,technological innovation capability is introduced as an intermediary variable,regional marketization level as a moderator variable and various control variables,and empirically tests the mediation and moderation effects of knowledge-intensive service industry agglomeration mode on manufacturing industry upgrading;Finally,in view of the characteristics of large differences and unbalanced development in the eastern,central and western regions of China,the direct effect of the specialized agglomeration and diversified agglomeration of knowledge-intensive service industries in different regions on the upgrading of the manufacturing industry is studied by means of comparative analysis.The empirical analysis results of this paper show that:(1)The relationship between the level of specialized agglomeration of knowledge-intensive service industry and the upgrading of manufacturing industry does not conform to the null hypothesis,but has a significant inverted U-shaped relationship.(2)The specialized agglomeration and diversified agglomeration of knowledge-intensive service industries both guide the industrial upgrading of manufacturing enterprises through technological innovation capabilities,and the industrial structure changes from low-end labor-intensive to highend capital and technology-intensive.(3)The level of regional marketization plays a significant role in regulating the impact of different knowledge-intensive service industry agglomeration models on the upgrading of the manufacturing industry.(4)The influence of knowledge-intensive service industry agglomeration model on the upgrading of manufacturing industry shows obvious regional heterogeneity.Research implications:(1)Continuously optimize the internal structure of the knowledge-intensive service industry,encourage the high-quality agglomeration and development of the service industry,and reduce the blind competition of local governments in the process of promoting the development of the knowledge-intensive service industry.(2)According to local conditions,formulate differentiated knowledgeintensive service industry development policies.(3)Increase capital investment in knowledge-intensive service industries. |