Tax progressivity is often at odds with efficiency.
atoddswith 教你一招 可译为“与...想牴牾” 改译：累进税往往同高效率相牴牾。
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。
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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