Research On The Influence Of Digital Economy On The High-quality Economic Development From The Perspective Of Efficiency

High-quality Economic Development(HQED)is the theme of China’s economic and social development in the 14 th Five-Year Plan the core of which lies in improving Total Factor Productivity(TFP).At present,the rapid development of the digital economy is driving changes in human production methods,social production relations and all-round changes in the economic and social structure,which has a wide and significant impact on promoting consumption,boosting investment and creating job opportunities.However,scholars are divided on whether there is a "Solow paradox" in the digital economy.The question of whether the digital economy can improve total factor productivity is still inconclusive,and the mechanism by which the digital economy affects total factor productivity is imprecise.Therefore,an study of why and how the digital economy affects total factor productivity,and an accurate assessment of the effect of the digital economy on total factor productivity are important to utilize the effectiveness of the digital economy in leading HQED.The main contents of this dissertation are as follows: First,based on domestic and international research,the connotation and characteristics of the digital economy are explained based on the theory of techno-economic paradigm.Based on Aghion and Howitt’s(2009)endogenous growth model,a mathematical model of the digital economy that affects HQED is constructed.Using "Connection-Data-Integration" as the main line,this dissertation analyzes the theoretical mechanism of the digital economy influencing HQED at three levels: Macro-economy,industry,and enterprise;Second,using international Input-Output Table data,the scale of digital economy of major countries in the world are measured and compared.To construct an index system for measuring the development level of China’s digital economy,adopt the Entropy-TOPSIS method to measure the digital economy index,and using Kernel Density Estimation,Natural Breakpoints Method,Moran’s Index,Thiel Index,Convergence Model analyze its spatial and temporal evolution characteristics and regional differences;Third,adopt the Global Malmquist-Luenberger index method to measure the expanded TFP,and use static and dynamic panel regression models;The Fourth,based on the results of theoretical and empirical analyses,suggestions for the digital economy to empower HQED at the government,industry and enterprise levels are proposed.The findings of this dissertation are as follows: First,China’s digital economy development has an aggregate advantage.But its contribution in national economic growth still needs to improve.The development level of China’s digital economy is rising year by year,and the digital economy in the three major regions decreases from East-Central-West in order,with multi-level differentiation in each region.There are convergence,absolute convergence and conditional convergence in the whole country and in the three regions,but the current regional imbalance of digital economy is still significant,and the imbalance mainly originates from intra-regional differences;Secondly,at the macro level,digital economy can promote TFP.The effect of developed countries is better than that of developing countries,and the effect of central and western regions and low-productivity regions in China is better than that of eastern regions and high-productivity regions.In terms of the mechanism of action,both developed and developing countries’ digital economy can promote TFP through improved technical efficiency and technological progress,but the effect of technological progress in developed countries’ digital economy is significantly better than that in developing countries;Third,at the industry level,the digital economy significantly boosts TFP in agriculture,manufacturing,and services.By region,the efficiency improvement effect of the digital economy on agriculture and service industry is stronger in central and western regions,while the efficiency improvement effect of the digital economy on manufacturing industry is more obvious in eastern regions.By industry,the digital economy boosts TFP in textiles,electrical machinery and equipment,special equipment,wholesale and retail,warehousing and postal,finance,but does not significantly affect in pharmaceutical manufacturing,computer and real estate.The mechanism test shows that the increase in TFP in agriculture and service industries is mainly due to the improvement of technical efficiency,while the increase in TFP in manufacturing industry is mainly due to technological progress;Fourth,at the firm level,there is an "inverted U-shaped" relationship between the digital economy and firm TFP,and the current digital economy mainly plays a positive role in driving firm TFP.The heterogeneity analysis shows that the TFP of medium-and low-technology enterprises in the growth period enjoys more obvious dividends from the digital economy.In terms of the mechanism of action,the digital economy can empower the TFP of enterprises through technological innovation and management innovation,and technological innovation and management innovation are complementary.The main contributions of this dissertation are as follows: First,it constructs a theoretical framework for the digital economy to influence the HQED.The theoretical interpretation of the multi-level mechanism of the digital economy influencing the HQED from the macro,industrial and enterprise aspects has enriched the research on the HQED and provided useful ideas for the research on the HQED and digital economy;Second,it reveals the development logic of the digital economy as a new economic form.Based on the theory of technology-economy paradigm,this dissertation refines the characteristics of digital economy,enriches the theoretical research on digital economy,and provides theoretical support for guiding the healthy and sustainable development of digital economy;Thirdly,it proposes an internationally comparable method for measuring the scale of digital economy and designs an index system for measuring the development level of China’s digital economy.Based on Input-Output Table data,the scale of the digital economy of 38 countries in the world is measured under the same standard.The digital economy development index is constructed from five aspects: digital technology,digital infrastructure,value of data elements,digital industrialization and digitization of industry,which expands the research on the measurement of digital economy;Fourthly,the impact effect,impact mechanism and impact difference of digital economy on HQED from the perspective of efficiency are clarified.It provides policy implications for the digital economy to drive HQED,and enriches the research on the "Solow paradox" of the digital economy.