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April 14, 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 TOTAL COST

The opportunity cost incurred by all of the factors of production used in the long run (when all inputs are variable) by a firm to produce a good or service, including wages paid to labor, rent paid for the land, interest paid to capital owners, and a normal profit earned by entrepreneurs. Unlike short-run total cost, long-run total cost cannot be separated into fixed cost and variable cost. In the long run, all inputs are variable, so all cost is variable.

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BROWN PRAGMATOX
[What's This?]

Today, you are likely to spend a great deal of time watching infomercials trying to buy either a replacement remote control for your television or a replacement nozzle for your shower. Be on the lookout for gnomes hiding in cypress trees.
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This isn't me! What am I?

The average length of a "business lunch" is about 36 minutes.
"Difficulty is the excuse history never accepts. "

-- Edward R. Murrow, News broadcaster

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