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IMPERFECT COMPETITION: Any markets or industries that do not match the criteria for perfect competition. The key characteristics of perfect competition are: (1) a large number of small firms, (2) identical products sold by all firms, (3) freedom of entry into and exit out of the industry, and (4) perfect knowledge of prices and technology. These four characteristics are essentially impossible to match in the real world.

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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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Today, you are likely to spend a great deal of time at the confiscated property police auction wanting to buy either a square lamp shade with frills along the bottom or an electric coffee pot with automatic shutoff. Be on the lookout for broken fingernail clippers.
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Okun's Law posits that the unemployment rate increases by 1% for every 2% gap between real GDP and full-employment real GDP.
"There is no point at which you can say, „Well, I'm successful now. I might as well take a nap.¾"

-- Carrie Fisher, actress, writer

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