Dan Mitchell of the Cato Institute gives an introductory lesson on the Laffer Curve. The text below is lifted from the youtube summary.

The Laffer Curve charts a relationship between tax rates and tax revenue. While the theory behind the Laffer Curve is widely accepted, the concept has become very controversial because politicians on both sides of the debate exaggerate. This video shows the middle ground between those who claim "all tax cuts pay for themselves" and those who claim tax policy has no impact on economic performance. This video, focusing on the theory of the Laffer Curve, is Part I of a three-part series. Part II reviews evidence of Laffer-Curve responses. Part III discusses how the revenue-estimating process in Washington can be improved. For more information please visit the Center for Freedom and Prosperity's web site: www.freedomandprosperity.org