税率的粘性——来自所得税改革的经验证据

2007年新所得税法的颁布和实施,为税率粘性的检验提供了一个"自然实验"场所。利用我国上市公司2007年和2008年的数据进行的研究表明,上市公司名义所得税率下降时实际所得税率下降的幅度,要显著高于名义所得税率上升时实际所得税率上升的幅度,即存在税率粘性。进一步观察可以发现,企业的所有制形式和所在地区的税收征管力度是影响税率粘性的重要因素。这一结论为评价所得税改革的经济后果和实施效果提供了经验指标,也为进一步洞悉企业的税收筹划行为以及加强税务部门的税收征管工作提供了有益启示。

Stickiness of Tax Rate——Evidence from Chinese Income Tax Reform

The Chinese income tax reform of 2007 provides a natural experimental opportunity to examine stickiness of tax rate.Based on data of Chinese listed companies during 2007 and 2008,the author finds that the extent of efficient tax rate’s decreasing because of nominal tax rate’s decreasing is significantly larger than the extent of efficient tax rate’s increasing because of nominal tax rate’s increasing.In other words,there is stickiness of tax rate.Further analysis shows that ownership nature and tax enforcement effort are important factors affecting stickiness of tax rate.Conclusions of this paper provide empirical proxy to evaluating economics consequence of tax reform,and have useful implications to understand enterprise’s tax planning activity and strength tax enforcement.