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December 2, 2012

Demagoguery and Truth About Taxes

The popular media has lately been full of astonishing piffle with regards to taxation—so much so that a reasonably smart listener might suppose that there was some magnificent disagreement among economists, like there is among lawyers in a court case. Of course, there is not; we economists are in broad agreement about the facts of taxation. This does not mean we agree about policy, for there is more to any policy decision than the truths of taxation. Still, we should be a bit mindful of demagoguery about taxes. This column will focus on known truths of taxation.

First, higher taxes on a good or service will lead to less of it being consumed and produced than would otherwise have been the case. So, a higher tax rate must lead to less economic activity, all things being equal. Of course, all things are never equal. Oftentimes taxes are cut at a time the economy is stalling or increased as it rebounds. Unsurprisingly it is common to have coincident periods of increased tax rates alongside a booming economy. It actually requires statistical modeling to tease out the effect, so when you hear someone comparing tax rates and growth using one historical example you may be certain they are either lying or have no idea what they are talking about (or both).

Second, the effects of tax rate changes are nonlinear in the sense that a small tax increase causes less of a decline in economic activity than a big tax increase. Moreover, the rate of tax that matters most in dampening economic activity is that levied in the last dollar, not the first dollar earned. This is the higher marginal tax rate economists warn about.

These truths combine to explain many things including the Laffer Curve, a hypothesized relationship between marginal tax rates and tax revenues. A staple of supply-side economics this theory roughly suggests that too high a tax rate will dampen economic growth so much that overall tax revenues will decline. The converse is also true that at some point lowering tax rates will boost the economy so much that tax revenues will actually increase. This is because there is both a mathematical relationship (higher rates lead to more revenue) and an economic relationship (higher tax rates leads to less economic activity). While the existence of a Laffer Curve is largely accepted, the best evidence suggests that we are a long, long way from having tax rates that are high enough to feel the effect of the Laffer Curve. So, a tax cut will almost certainly not increase tax revenues, while a tax rate increase will not grow revenues proportionately.

Debates about tax rates are appropriately political. Taxes influence decisions about how much we save, where we live, how many children to have, and how big a home to buy and what type of government we have. We should all understand though, what is true and not true in the debate over the appropriate level of taxes.

Link to this commentary: https://commentaries.cberdata.org/652/demagoguery-and-truth-about-taxes

Tags: economy, taxes, economics, politics


About the Author

Michael Hicks cberdirector@bsu.edu

Michael J. Hicks, PhD, is the director of the Center for Business and Economic Research and the George and Frances Ball distinguished professor of economics in the Miller College of Business at Ball State University. Note: The views expressed here are solely those of the author, and do not represent those of funders, associations, any entity of Ball State University, or its governing body.

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