Research On The Effect Of Industry Digitization On Manufacturing Upgrading In Yangtze River Economic Belt

With the deepening of "digital China" and "Made in China 2025",China’s industrial digitalization has made a breakthrough.It can provide a development opportunity for the high-quality development of the manufacturing industry,create a broader market for manufacturing upgrading,and lead the acceleration of manufacturing innovation.The Yangtze River Economic Belt,which runs through the east,west and north,radiates north and south.With clustered industries and a solid economic foundation and advantages,the Belt has the strongest comprehensive competitiveness and the highest level of economic development in China,driving the the overall development of China.Therefore,it is of strategic significance and practical value to study the empowering effect of industrial digitalization on manufacturing upgrading.First of all,after combing the related literature foundation of industrial digitalization and manufacturing upgrading,the theoretical mechanism of industrial digitalization enabling manufacturing upgrading is deeply analyzed.At the same time,on the one hand,the comprehensive evaluation index system of manufacturing upgrading is constructed from four aspects: scale,efficiency,innovation and energy environment;on the other hand,the comprehensive evaluation index system of industrial digitalization is constructed from four dimensions: agricultural digitalization,industrial digitalization,financial digitalization and E-commerce level.The improved entropy weight method is used to measure the data of 110 prefecture-level cities in the Yangtze River Economic Belt from 2011 to 2020,and finally statistical analysis is made.Secondly,in order to analyze the direct effect of industrial digitalization on manufacturing upgrading,we use the panel data of 110 cities in the Yangtze River Economic Belt from 2011 to 2020 to build the panel double fixed effect model.At the same time,the robustness of the model is tested by replacing variables,removing provincial capital cities and removing municipalities directly under the central government.The endogenous problem of the model is solved by using instrumental variable method and systematic GMM estimation.It further verifies that industrial digitalization has a significant positive impact on manufacturing upgrading.Thirdly,human capital and technological innovation are used as intermediate media,and the transmission mechanism is tested based on the intermediary effect.It is found that the digitalization of industry has significant technological innovation effect and human capital effect.Industrial digitalization reduces costs,improves quality and increases efficiency through human capital and technological innovation,which is an important magic weapon to upgrade the manufacturing industry.Finally,the heterogeneity analysis is carried out from the following two aspects: on the one hand,by establishing the panel threshold regression model,it is found that human capital,technological innovation and Internet level are all the conditions for realizing the digital upgrading effect of industries in the Yangtze River Economic Belt.It presents a nonlinear feature of "marginal increase";On the other hand,on the basis of different economic development level and geographical locations,the cities are divided into several sub-samples for further analysis.It is found that,regardless of different development levels or different regions,industrial digitalization has a differentiated impact on the upgrading of manufacturing industry in the Yangtze River Economic Belt.Therefore,this paper puts forward practical policy suggestions for upgrading the digital empowerment manufacturing industry from the perspectives of reasonably promoting digital transformation,encouraging innovation-driven and talent-driven,and formulating differentiation strategies according to local conditions.