The Importance of Asymmetric Tax Policy and Dangers of Aggregation
论文指出现有税收政策中复杂的非对称特征常被忽略，而用单一有效税率加总会低估其扭曲效应，非对称性造成的损失往往大于税率水平本身。
Existing tax policies have many complex features that make distinctions across goods, factors, and financial structures that distort economic allocations. Their importance is ignored when tax policy is summarized by an “effective” tax rate. In fact, the losses due to asymmetries are often larger than the losses due to the level of taxation.