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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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SUBSTITUTE-IN-PRODUCTION

One of two (or more) goods that use the same resource for production in an exclusionary manner. A substitute-in-production is one of two alternatives falling within the other prices determinant of supply. The other is a complement-in-production. An increase in the price of one substitute good causes a decrease in supply for the other.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius trying to buy either a flower arrangement in a coffee cup for your father or a how-to book on meeting people. Be on the lookout for vindictive digital clocks with revenge on their minds.
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Junk bonds are so called because they have a better than 50% chance of default, carrying a Standard & Poor's rating of CC or lower.
"Luck is what happens when preparation meets opportunity. "

-- Seneca, Roman philosopher

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