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September 30, 2023 

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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).

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OLIGOPOLY: A market structure dominated by a small number of large firms, selling either identical or differentiated products, and significant barriers to entry into the industry. This is one of four basic market structures. The other three are perfect competition, monopoly, and monopolistic competition.

     See also | market structure | firm | industry | oligopoly characteristics | oligopolistic behavior | market control | product differentiation | barrier to entry | concentration ratio | merger | nonprice competition | collusion | cartel | monopoly | monopolistic competition | oligopsony | antitrust laws | technology | economic growth |


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OLIGOPOLY, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2023. [Accessed: September 30, 2023].


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SCARCITY

A pervasive condition of human existence that results because society has unlimited wants and needs, but limited resources used for their satisfaction. This fundamental condition is the common thread that binds all of the topics studied in economics.

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