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January 4, 2026 

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REALISM OF PERFECT COMPETITION: Perfect competition is an idealized market structure that does NOT exist in the real world. While some real world industries might come relatively close to a one or two of the four key characteristics of perfect competition, none matches all four sufficiently that we can declare a perfectly competitively industry. Some industries come close on the large number of small firms and the identical product characteristics. A few industries have relatively good, although not perfect, information about prices and technology. However, almost all industries fall far short of the perfect mobility characteristics.

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AGGREGATE DEMAND DECREASE, LONG-RUN AGGREGATE MARKET

A shock to the long-run aggregate market caused by a decrease in aggregate demand resulting in and illustrated by a leftward shift of the aggregate demand curve. A decrease in aggregate demand in the long-run aggregate market results in an increase in the price level but no change in real production. The level of real production resulting from the aggregate demand shock is full-employment real production.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius hoping to buy either storage boxes for your income tax returns or an AC adapter for your CD player. Be on the lookout for bottles of barbeque sauce that act TOO innocent.
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Parker Brothers, the folks who produce the Monopoly board game, prints more Monopoly money each year than real currency printed by the U.S. government.
"When we do the best that we can, we never know what miracle is wrought in our life, or in the life of another."

-- Helen Keller

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