Of course, if anybody is interested in what the report actually said, here's a quote from the
abstract , acknowledging that it's largely guesswork:
Quote:
Estimating efficiency costs is very challenging because the tax system has such extensive and diverse effects on behavior. In fact, we found no comprehensive estimates of the efficiency costs of the current federal tax system. The two most comprehensive studies we found suggest that these costs are large--on the order of magnitude of 2 to 5 percent of GDP each year (as of the mid-1990s). However, the actual efficiency costs of the current tax system may not fall within this range because of uncertainty surrounding taxpayers' behavioral responses, changes in the tax code and the economy since the mid-1990s, and the fact that the two studies did not cover the full scope of efficiency costs. The goal of tax policy is not to eliminate compliance and efficiency costs. The goal of tax policy is to design a tax system that produces the desired amount of revenue and balances the minimization of these costs with other objectives, such as equity, transparency, and administrability.
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