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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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BREAKEVEN OUTPUT

The quantity of output in which the total revenue is equal to total cost such that a firm earns exactly a normal profit, but no economic profit. Breakeven output can be identified by the intersection of the total revenue and total cost curves, or by the intersection of the average total cost and average revenue curves. The most straightforward way of noting breakeven output, however, is with the profit curve. For a perfectly competitive firm breakeven output occurs where price is equal to average total cost.

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Today, you are likely to spend a great deal of time searching for rummage sales seeking to buy either a birthday gift for your grandmother or a T-shirt commemorating yesterday. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"Think not of yourself as the architect of your career but as the sculptor. Expect to have to do a lot of hard hammering and chiseling and scraping and polishing. "

-- B. C. Forbes, founder, Forbes magazine

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