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June 8, 2026 

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ECONOMIC EFFICIENCY: Obtaining the most consumer satisfaction from available resources. This is what most economists mean when the term efficiency arises. Economic efficiency means our economy is doing the best job possible of satisfying unlimited wants and needs with limited resources--that is, of addressing the problem of scarcity.

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OLIGOPOLY CHARACTERISTICS: The three most important characteristics of oligopoly are: (1) an industry dominated by a small number of large firms, (2) firms sell either identical or differentiated products, and (3) the industry has significant barriers to entry.

     See also | oligopoly | oligopolistic behavior | industry | product differentiation | barrier to entry | concentration ratio | merger | nonprice competition | collusion | cartel | monopoly | monopolistic competition | antitrust laws |


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OLIGOPOLY CHARACTERISTICS, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2026. [Accessed: June 8, 2026].


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AVERAGE REVENUE AND MARGINAL REVENUE

A mathematical connection between average revenue and marginal revenue stating that the change in the average revenue depends on a comparison between average revenue and marginal revenue. For perfect competition, with no market control, marginal revenue is equal to average revenue, and average revenue does not change. For monopoly and other firms with market control, marginal revenue is less than average revenue, and average revenue falls.

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Today, you are likely to spend a great deal of time at a flea market wanting to buy either a T-shirt commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki or a wall poster commemorating the 2000 Olympics. Be on the lookout for telephone calls from long-lost relatives.
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The first "Black Friday" on record, a friday marked by a major financial catastrophe, occurred on September 24, 1869 -- A FRIDAY -- when an attempted cornering of the gold market induced a financial crises and economy-wide depression.
"Never confuse a single defeat with a final defeat."

-- F. Scott Fitzgerald, writer

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