| Recent years,China has attached great importance to the development of service industry,which has been regarded as the strategic point of industrial structure upgrading.Therefor the proportion and level of China's service industry have been greatly enhanced,making service industry the main part of China's national economy.At the same time,the service sectors are expanding and the industrial boundaries are becoming increasingly blurred.The integrations of the service industries are burgeoning,and new formats and new models are emerging.Outline of Innovative Development of Service Industry(2007-2025),delivered by China's National Development and Reform Commission in June 2017,explicitly proposes to ―encourage mutual integration within the service sector‖ for the first time.The development of service industry internal integration has been officially trumpeted.It is necessary to formulate corresponding policy measures and provide important academic references for the research of service industry internal integration,which is conducive to perfect the theoretical system of industry integration,by comparing service industry internal integration between China and USA to analyze the differences between the two countries and find out the paths and influences of integration.In this paper,on the basis of the traditional theory of industrial convergence,the formation mechanism of service industry internal integration is supplemented,and the typical cases of Chinese and foreign countries are compared and analyzed.After that,an index system measuring service industry internal integration is established,from the perspectives of demand and input,with five dimensions of level,speed,depth,service-influence and servicereaction based on Input-Output theory.A China-USA comparative research is made on this index system using OECD Input-Output tables to find out their main sectors,high-speed sectors,high-soft sectors,high-influence sectors and high-reaction sectors respectively.The department characteristics of the two countries are compared and analyzed to select their strategic priority sectors.And then the path selection differences and economic impacts of China and USA are analyzed to provide useful reference for relevant policy setting.We find that,generally speaking,the integration of China's service industries is in the ascendant,while America has entered a relatively stable stage where the integration is quite balanced.As for sector characteristics,these two countries have similarities and differences.The main sectors of the internal integration of the service industry are typically characterized by the pillar departments of the national economy or the departments which have important influence on the value chain.China's services sector is growing at a faster pace than America,while America has done well in the depth of integration within the services sector.China's service industries are not flexible enough,and there is still a lot of room for internal integration and development.China's high-influence sectors are computer and related activities,R&D and other business activities while in America financial intermediation outshines others,showing obvious financial characteristics.To sum up,strategic priority sector of China and the USA is R&D and other business activities,financial intermediation respectively.Differences of economic development stages between China and the USA lead to their different integration paths,respectively,are "R&D-business activities type service industry internal integration road" "financial infiltration type service industry internal integration road".China's "R&D-business activities type service industry internal integration road" has positive practical significance and far-reaching economic impact on promoting the integration and development of the service industry with high quality and virtuous circle,thus should be affirmed and continued.On this basis,we propose the following policy suggestions as promoting the development of service industry internal integration,building strong engines of the integration,strengthening the development potential of service industry internal integration and releasing kinetic energy of the integration. |