| Digital economy and digital technology are important factors in the fourth industrial revolution.And fostering technological innovation in digital enterprises is the key to help us seize the opportunities.But at present the scale of our digital enterprises is small,most of the digital enterprises in the growth period.Moreover,technological innovation activities of digital enterprises are often accompanied by high investment,high risk and high sunk cost.Therefore,it is necessary for the government to introduce policies to intervene and reduce the scientific research risks of digital enterprises.Research and development expense deduction is a common form of tax incentive used by many countries to encourage innovation.In order to adapt to China’s innovation-driven development,the policy has been updated continuously in recent years,which has attracted the continuous attention of scholars.According to the existing research results,it is generally believed that the R&D expense deduction policy promotes the innovation input of enterprises,while the influence on the innovation output is uncertain.Despite constant attention,there is no research on the impact of R&D expense deduction policy on technological innovation of digital enterprises.Based on the above background and research status,this thesis carries out an empirical study on the "exogenous impact" of the R&D expense plus deduction of the New Deal officially implemented in 2016 after analyzing the theory,policy and technological innovation status of digital enterprises.In this thesis,listed digital enterprises that enjoy additional deduction of R&D expenses are taken as the processing group,and listed enterprises that belong to the six industries on the negative list stipulated by the New Deal are taken as the control group.After collecting the panel data of the sample enterprises from 2013 to 2019.A bidirectional fixed differential model was established to verify the effect of R&D expense deduction policy on technological innovation of digital enterprises from two aspects of innovation input and innovation output,and the robustness test and heterogeneity analysis were carried out.The results show that: first,the additional deduction of R&D expenses has a significant promoting effect on both innovation input and innovation output of digital enterprises,and the promoting effect on innovation input is stronger than that on innovation output;Second,Compared with small-scale digital enterprises,the additional deduction of R&D expenses has more obvious effect on the incentive effect of technological innovation in large-scale digital enterprises.Third,Digital enterprises belonging to the electronic information manufacturing industry and non-eastern digital enterprises are more sensitive to the research and development deduction policy;Forth,The additional deduction of R&D expenses has a positive incentive effect on the innovation input of state-owned digital enterprises and the innovation output of non-state-owned digital enterprises.Based on the above results,this thesis puts forward some suggestions: first,strengthen the support for the deduction of R&D expenses of digital enterprises in an all-round way;Second,for different scale,industry,region,and the nature of enterprise property rights to make different policies;Third,we will improve the efficiency of implementing the policy of deducting additional research and development costs. |