In estimating the effects of capital income taxation, different studies measure different effective tax rates. This paper categorizes effective tax rate estimates into six basic types, and discusses the usefulness of each. For marginal effective tax rates, some studies estimate the additional...

Each environmental tax in the U.S. is designed to collect revenue for a trust fund used to clean up a particular pollution problem. Each might be intended to collect from a particular industry thought to be responsible for that pollution problem, but none represents a good example of an...