| As a strategic industry,integrated circuit is the foundation and core of information development in the new era,which is related to the overall development of the country and society.At the same time,the rapid development of artificial intelligence and other technologies has put forward higher requirements for the basic integrated circuit industry,but there is still a big gap between China’s integrated circuit industry and the international advanced level.In the past,the way of relying on traditional factor input has been unable to meet the development requirements of various aspects,and innovation has become the development theme of the current integrated circuit industry.Research and development(R&D)is an important indicator to measure the innovation competitiveness of enterprises in the field of science and technology,and preferential income tax policy is an important tool to encourage enterprises to carry out R&D activities.By selecting IC enterprises with strong innovation willingness,the influence of innovation willingness on R&D investment is excluded to a certain extent,and the influence of income tax on R&D investment of IC enterprises is explored.This paper explores the incentive effect of preferential income tax policies on R&D investment by combining theory and practice.In terms of theory,this paper explores the impact mechanism of income tax preference on corporate R&D investment based on market failure theory,innovation theory and tax regulation theory.In terms of statistical analysis,the tax burden of different industries is measured,and the changes in the tax burden level of the IC industry are understood through comparison.And from the inclusive policy and IC special preferential policy two aspects of income tax preferential policies are sorted out.In terms of empirical analysis,this paper selects the data of 37 IC enterprises listed on the Science and Technology Innovation Board from 2017 to 2021 as research samples,and uses the system GMM model and time fixed effect model to analyze the impact of income tax incentives on their R&D investment.The results show that income tax preference has a significant role in promoting the R&D investment of science and technology innovation board integrated circuit enterprises.Further research finds that the preferential income tax policy lagged one period and lagged two periods both have a significant incentive effect on the current period R&D investment,that is,the impact of preferential income tax policy has a lag to a certain extent.On the basis of theoretical and empirical analysis,the following suggestions are put forward: first,strengthen the special tax preferential policy for IC industry;Second,we should improve the preferential tax policy system,combining direct tax with indirect tax preference,combining ex-ante incentive with ex-post incentive policy;Third,strengthen the management of tax collection and information technology;Fourthly,the evaluation mechanism of preferential tax policies should be established. |