It is argued that taxation causes three kinds of deadweight losses and two types of direct costs. The deadweight losses arise from substitution, evasion, and avoidance activities while the direct costs are administrative and compliance costs. Some of these social costs tend to be discontinuous...

The theory of optimal taxation has , for the pas two decades , been the reigning normative approach of taxation. This paper argues that , in its current state, optimal tax theory is incomplete as a guide to action concerning many critical issues in tax policy. It is incomplete because it has not...