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January 20, 2026 

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ECONOMIC RENT: The difference between the payment received by a resource owner and the opportunity cost of the resource. This is the payment received by a resource owner over and above the minimum needed to produce a good. Many resource owners are able to extract a portion of the economic profit generated by a business as a economic rent.

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OLIGOPOLY, CONCENTRATION

Oligopoly is a market structure that contains a small number of relatively large firms, meaning oligopoly markets tend to be concentrated. A small number of large firms account for a majority of total output. Concentration unto itself is not necessarily bad, but it often leads to inefficient behavior, such as collusion and nonprice competition. Concentration is measured in three ways--market share, concentration ratio, Herfindahl index.

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ORANGE REBELOON
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Today, you are likely to spend a great deal of time at the confiscated property police auction looking to buy either a pair of red goulashes with shiny buckles or a handcrafted bird feeder. Be on the lookout for letters from the Internal Revenue Service.
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The 22.6% decline in stock prices on October 19, 1987 was larger than the infamous 12.8% decline on October 29, 1929.
"Act well at the moment, and you have performed a good action for all eternity."

-- Johann Kaspar Lavater

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