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October 10, 2026 

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ALLOCATION EFFECT: The goal of imposing taxes to change the allocation of resources, that is, to discourage the production, consumption, or exchange or one type of good usually in favor of another. This is one of two reasons that governments impose taxes. The other reason is the revenue effect. Because people would rather not pay taxes, taxes create disincentives to produce, consume, and exchange. If society deems that less of a particular good, such as alcohol, pollution, or cigarettes are "bad," then a tax can reduce its production and consumption, and thus change the allocation of resources.

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LAFFER CURVE: The graphical inverted-U relation between tax rates and total tax collections by government. Developed by economist Arthur Laffer, the Laffer curve formed a key theoretical foundation for supply-side economics of President Reagan during the 1980s. It is based on the notion that government collects zero revenue if the tax rate is 0% and if the tax rate is 100%. At a 100% tax rate no one has the incentive to work, produce, and earn income, so there is no income to tax. As such, the optimum tax rate, in which government revenue is maximized, lies somewhere between 0% and 100%. This generates a curve shaped like and inverted U, rising from zero to a peak, then falling back to zero. If the economy is operating to the right of the peak, then government revenue can be increased by decreasing the tax rate. This was used to justify supply-side economic policies during the Reagan Administration, especially the Economic Recovery Tax Act of 1981 (Kemp-Roth Act).

     See also | taxes | supply-side economics | Kemp-Roth Act | income tax | conservative |


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CROSS ELASTICITY OF DEMAND

The relative response of a change in the demand for one good to a change in the price of another good. More specifically the cross elasticity of demand is percentage change in the demand for one good due to a percentage change in the price of another good. This notion of elasticity captures the other prices demand determinant. Three other notable elasticities are the price elasticity of demand, the price elasticity of supply, and the income elasticity of demand.

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