Research On The Transformation Of Macroeconomic Control Policy Effects In The Background Of Digital Economy

Entering the new stage of development,China’s economy "needs to change its growth rate from high to medium high,its development mode from scale and speed to quality and efficiency,its economic structure adjustment needs to change from incremental expansion to adjustment of stock and optimization of increment,and its development impetus needs to change from mainly relying on capital and low-cost labor and other factors to innovation-driven." At the same time,driven by the innovation of 5G and artificial intelligence,big data and cloud computing,as well as the Internet and the Internet of things,China’s economy is transforming from consumer Internet platform economy to industrial Internet platform economy,and is about to enter the digital economy 2.0 era.Digital technology innovation and industrial integration have given new impetus to the real economy,spurred the birth of new products and new industries,promoted the upgrading of industrial structure,and opened up new consumption models and new business forms.Therefore,the high-quality economic development in the digital economy also makes the theory and practice of macroeconomic regulation and control face new challenges and must explore new ways.Therefore,this dissertation follows the realistic course of the development of digital economy in China,under the economic environment of consumer Internet platform and industrial Internet platform respectively,this dissertation studies the efficiency reform of China’s macroeconomic policy caused by digital economy new business type.In particular,in view of the actual demand for macro-control policy tools for China’s innovation and development,this dissertation first establishes a new Keynesian dynamic stochastic general equilibrium model(DSGE model)to focus on the economic mechanism of platform economy to enhance the effects of monetary policy,fiscal policy and technological progress policy;Secondly,based on the time series data of macroeconomic variables,the vector error correction model with external variables is used to empirically test the theoretical research results;Finally,according to the theoretical and empirical research conclusions of this dissertation,the dissertation discusses the reference countermeasures to improve the level and efficiency of macroeconomic governance in China.First of all,in order to clarify the macroeconomic mechanism of data factor,analyze and evaluate the dynamic effects of macroeconomic policies promoting the development of digital economy under the consumer Internet,based on the economic characteristics of Taobao.Jing dong Mall and Pin duo duo.this dissertation first constructs a new Keynesian DSGE model including the main body of the consumer Internet platform.It studies the dynamic effects of monetary policy,fiscal subsidy rate policy and non-digital human capital investment impact on consumption growth,data capital accumulation,total output growth rate and inflation rate respectively.In addition,it simulates the effect of the coordination of monetary policy and fiscal subsidy policy to promote the development of digital economy in China.It is found that the indepth learning and timely feedback of the network platform on consumer demand big data improves the efficiency of monetary policy in regulating prices and stimulating the growth of domestic demand,accelerates the accumulation of data capital and presents different characteristics from the non digital economy.The moderate subsidy of the government to the network platform research and experimental development(R&D)project can continuously stimulate consumption growth.which is conducive to improving the efficiency of market allocation.weakening the rigidity of commodity price increases,and maintaining long-term price stability.Non-digital human capital investment is a double-edged sword,which can promote economic growth,but inhibit the accumulation of data capital.Under the digital economy,the scientific coordination of fiscal subsidy rate policy and monetary policy can enable China’s macro-economy to maintain sustainable development on the growth path.Secondly,in order to explain the efficiency change mechanism of macro-control policy of digital empowerment,according to the ’sharing economy" practice of sharing bicycles,telecom and Internet operators,industrial Internet platforms and other entities that provide shared products or shared services,this dissertation constructs a new Keynesian DSGE model including non-shared product manufacturers and industry digital sharing platform.This dissertation studies the mechanism of industrial digitization to enhance the effect of macro-control policies,and analyzes the dynamic effects of conventional and structural macro-control policies.It is found that the regulation and control effect of industrial digitization on loose monetary policy has the role of "amplifier" and contributes to the Pareto improvement of social consumption.Structural tax reduction can promote economic growth,but with the promotion of industrial digitization.the promoting role of tax reduction policy shows a weakening trend.The technological progress policy of digital sharing platform can promote economic growth and extend to the final consumption of residents,but the technological progress policy of non-shared product manufacturers leads to the substitution effect of the two kinds of consumption,and the degree of industrial digitization is proportional to the substitution effect.Compared with the traditional economy without digital platform.industrial digitization has improved the regulation and control effect of macroeconomic policies.In addition,drawing lessons from the theories and methods of macroeconomic policy analysis,combined with the practice of macroeconomic regulation and control in China,and using the macro time series data from the first quarter of 2002 to the fourth quarter of 2021,this dissertation constructs a vector error model including shocks such as monetary policy,fiscal policy and technological progress policy and external tool variables of digital economy.This dissertation makes an empirical test on the efficiency changes of the macro-control policy effects in the consumer Internet period and the industrial Internet period respectively.It is found that online consumption new business type and industrial digitization not only play an important role in expanding domestic demand,improving modern trade circulation system,promoting the optimization and upgrading of the whole industry chain,and cultivating new industries of digital economy.Moreover,it has also realized the "digital empowerment" of the macro-control governance system and promoted the efficiency reform of China’s macro-control policies.Finally,according to the research conclusion of this dissertation,this dissertation briefly describes some reference enlightenment to improve the macroeconomic governance system and improve the efficiency and ability of macroeconomic governance in the digital economy.