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January 24, 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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LONG-RUN MARGINAL COST

The change in the long-run total cost of producing a good or service resulting from a change in the quantity of output produced. Like all marginals, long-run marginal cost is an increment of the corresponding total. It is the change in long-run total cost divided by, or resulting from, a change in quantity. Long-run marginal cost is guided by returns to scale rather than marginal returns.

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APLS

ORANGE REBELOON
[What's This?]

Today, you are likely to spend a great deal of time lost in your local discount super center trying to buy either a how-to book on wine tasting or a bookshelf that will fit in your closet. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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This isn't me! What am I?

In 1914, Ford paid workers who were age 22 or older $5 per day -- double the average wage offered by other car factories.
"Wherever you go, no matter what the weather, always bring your own sunshine."

-- Anthony J. D'Angelo

CBA
Cost Benefit Analysis
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