This article analyzes the effect of tax law doctrines designed to reduce tax shelters, such as the business-purpose doctrine, and the economic-substance doctrine. The article analyzes these doctrines as changes to the marginal elasticity of taxable income. As these doctrines are strengthened,...

This paper considers whether knowledge of the tax law is socially desirable. Unlike other laws, which most often attempt to channel behavior, revenue-raising taxes attempt to avoid changing behavior; so, it is not obvious whether or when knowledge of the tax law is desirable. I argue that...