中文摘要：

为探讨税率、税基和税额优惠对中国上市公司财务保守行为的影响，建立了产品市场竞争条件下税率、税基和税额优惠影响融资行为的数学模型，以中国上市公司2001年-2005年数据为样本，以法定税率作为税率优惠的替代变量，以修正的实际税率作为税基和税额优惠的替代变量，使用LOGIT回归分析，在一个统一的框架内检验不同形式的税收优惠对财务保守行为的影响，使不同形式的税收优惠与融资行为的关系更明确，同时较好地克服了回归分析中的内生性问题。研究结果表明，较少的税基和税额优惠是导致上市公司财务保守的重要原因，而税率优惠对上市公司是否财务保守影响不大，该结论对于更好地发挥企业所得税优惠政策的经济调控功能有重要的指导意义。

英文摘要：

In order to test the relationship between tax preference and financial conservatism, a model is constructed explaining the relationship between tax preference including tax rate preference, tax base preference tax credit, and financial behavior, which considers the product market competition. Using statutory tax rate as the proxy for tax rate preference and effective tax rate as the proxy for tax base preference and tax credit, the relationship of tax preference of different types and financial conservatism are tested by employing LOGIT regression model based on the data of Chinese listed companies from 2001 to 2005, by which the relationship between tax preference of different types and financial behavior becomes more clear and the endogeneity problem is solved. The results show that companies with less tax base preference and less tax credit are more likely to be financially conservative, which is not caused by tax rate preference. This study is of great significance to guide the using of tax preference as a tool for macro economic control.