To explain why, let us start with the premise that the defenders of any progressive tax have to give some principled account of the optimal degree of tax progressivity.
我们的前提假设是：累进税的支持者必须要对最优累进率给出有力的解释。
Case study on progressivity analysis of health financing is a component of Equity Research in health Areas.
“卫生筹资累进性分析案例研究”是“卫生领域公平性系列研究”的组成部分。
In practice progressivity has tended to imply more than one rate of tax, for instance, which is necessarily less simple than a flat tax rate.
事实上，累进税意味着不仅仅只有一个税率。例如，累进税一定没有固定统一税率那么简单。
In practice progressivity has tended to imply more than one rate of tax, for instance, which is necessarily less simple than a flat tax rate.
事实上，累进税意味着不仅仅只有一个税率。例如，累进税一定没有固定统一税率那么简单。
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