关键词: 数字经济, 企业技术创新, 创新协同, 技术吸收

Abstract: Enterprise technological innovation the key link of endogenous technological progress to promote economic growth, has an important impact on promoting high-quality development of economy. In recent years, with the breakthrough of the new generation of digital technology, the digital economy is profoundly changing the social production and life style, and also has multi-dimensional impacts on the technological innovation activities of enterprises. So, does the digital economy significantly promote the innovation level of Chinese enterprises? What is its influence mechanism? Theoretically, digital economy has both direct and indirect impacts on enterprise innovation activities. The development of digital economy provides richer general technical tools for enterprise innovation activities, enabling enterprises to comprehensively improve traditional innovation activities with the help of digital simulation, digital twin, big data, cloud computing and other digital technologies. This will effectively reduce the innovation costs and the uncertainty of innovation benefits, so as to directly encourage enterprises to carry out R&D and innovation activities. The development of digital economy also enhances the connectivity of enterprise innovation networks, and provides digital cooperation platforms for heterogeneous innovation subjects. This will effectively improve the ability of enterprises to absorb external knowledge, promote the innovation synergy between enterprises and external heterogeneous innovation subjects, and then indirectly improve the level of enterprise innovation activities.
   On the basis of theoretical analysis, this paper combines China's provincial panel data from 2013 to 2019 with the data of A-share listed companies, and uses the macro-micro matching panel data set to carry out an empirical study on the innovation promoting effect of regional digital economy development at the enterprise level. Firstly, starting from the three dimensions of digital enabling industry development, digital infrastructure and the application degree of digital economy, this paper uses the global principal component analysis method to calculate the provincial digital economy development comprehensive index, and then uses the two-ways fixed effect model to test the relationship between digital economy and enterprise innovation. The results show that digital economy can not only have a significant positive impact on the growth of enterprise innovation output, but also play a positive role in improving the quality of enterprise innovation output. When the development degree of regional digital economy increases by 1%, the patent application and patent citation indicators representing the quantity and quality of enterprise innovation can increase by 0. 14% and 0. 07% respectively. The conclusion is still valid after changing key variables, changing estimation methods, changing model settings and other robustness tests, as well as the endogenous treatment of historical instrumental variables. At the same time, the innovation promoting effect of digital economy is also affected by the attribute characteristics of enterprises. In terms of property right attribute, the advantages of state-owned enterprises in operation and policy make them benefit more from the innovation promotion effect brought by digital economy. In terms of industry attributes, manufacturing enterprises that rely more on innovation activities get more digital innovation dividends. In terms of technical attributes, digital economy plays a more obvious role in improving the innovation quality of high-tech enterprises, while it plays a more significant role in catching up with the number of non-high-tech enterprises. What is more, the transmission mechanism test based on recursive equation shows that innovation synergy and technology absorption are important intermediary mechanisms for digital economy to promote enterprise technological innovation. Both of them can play an intermediary role in the impact of digital economy on the quantity and quality of enterprise innovation.
   The results of this paper have policy significance in the following two aspects. First of all, digital economy helps to improve the independent innovation ability of Chinese enterprises, and then improve the quality, efficiency and core competitiveness of economic development. Local governments at all levels should actively introduce policies to promote the construction of Digital China and improve the development level of regional digital economy. The governments should not only focus on building a regional industrial ecosystem of digital economy, and increase the depth and breadth of simultaneous interpreting of digital economy and traditional industries, but also build an industrial highland and innovation highland of digital economy around innovation chain, application chain and value chain based on regional comparative advantages, gather digital technology resources, and accelerate the expansion of digital technology application scenarios and the formation of emerging industries. Secondly, the promotion effect of digital economy innovation is affected by the characteristics of enterprises. When formulating relevant policies for digital economy development and promoting enterprise technological innovation, the governments should design different policies and measures according to the type of enterprises, and focus on the digital development of non-manufacturing enterprises and private enterprises, so as to improve the effectiveness and accuracy of policies and give full play to the innovation promotion potential of digital economy.

Key words: Digital Economy, Enterprise Technological Innovation, Innovation Synergy, Technology Absorption