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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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AXIOM

A basic precondition or assumption underlying a theory. Axioms are basic, unverifiable world view assumptions--including personal beliefs, political views, and cultural values--that form the foundation of a theory.

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Today, you are likely to spend a great deal of time browsing through a long list of dot com websites trying to buy either a velvet painting of Elvis Presley or a wall poster commemorating yesterday. Be on the lookout for crowded shopping malls.
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Before 1933, the U.S. dime was legal as payment only in transactions of $10 or less.
"Do what you feel in your heart to be right ‚ for you'll be criticized anyway. You'll be damned if you do and damned if you don't. "

-- Eleanor Roosevelt, first lady

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