Explains progressive, regressive, and proportional taxes and applies them to the value added tax (VAT).

Find a write-up about an engraving by Andrea Mantegna, "Bacchanal with a Wine Vat," with a description and images of the piece.

Forty-five states and many local government impose sales taxes on most goods and some services. This article explains the difference between sales taxes and income taxes, and how sales taxes are levied.

An image of Claudius.