"You can explain it to a congressman in six minutes, and he can talk about it for six months," Hal Varian, an economist, once noted of the tax revenue curve known as the Laffer curve. In concept ...

The Laffer curve has its origins way back in time; the Muslim philosopher Ibn Khaldun wrote in his 14th century work "The Muqaddimah": It should be known that at the beginning of the dynasty ...