边际有效税率、企业投资与税收政策调整

Marginal Effective Tax Rate, Enterprise Investment and Adjustment of Tax Policy

本文选取政府税收政策与企业投资行为作为理论研究的出发点,考察了包含法定税率、投资抵免或补贴、资本折旧、损失结转和公司所得税在内的边际有效税率理论模型,逻辑演绎的结论是:边际有效税率是企业投资项目的重要参考指标,应该与企业的预期回报率、市场利率、通胀率等联系起来,共同研究企业的投资行为;企业投资的税收效应表明:企业的投资方式、能力、决策依据与企业自由的资本结构有关,税收结构和政府的政策应该根据企业发展的需要进行调整;企业在从事人力资本投资、高新技术投资、风险投资等活动时,应该给与充分的税收支持,调动企业投资的积极性和持续稳定形成企业资本的动力。

This paper has chosen the government to examine the marginal effective tax rate model which tax policy and invest behavior theory includes statutory tax rate, investment credits or subsidies, capital depreciation, loss carryover and corporate income tax. The conclusive results of the study are as follows. Marginal effective tax rate as an important indicator in investment of enterprises is closely related to the expected rate of return of enterprise, market interest rate and inflation rate. The tax effects of enterprise investment indicate that mode of investment, decision-making, etc. are related to capital structure of enterprise. Enterprises engaged in the investment of human capital, high-tech and risk investment activities should receive tax support, as it can mobilize the enthusiasm of business investment and steady improvement of capital power of enterprise.