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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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MARKET EQUILIBRIUM, GRAPHICAL ANALYSIS

An analysis of market equilibrium using a graph that combines a demand curve and a supply curve. A graphical analysis of the market is used to ascertain information such as market equilibrium, equilibrium price, equilibrium quantity, shortage, and surplus. This is one of two basic methods of analyzing market equilibrium. The other is a numerical analysis using demand and supply schedules.

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Today, you are likely to spend a great deal of time flipping through the yellow pages trying to buy either a pair of gray heavy duty boot socks or a 50-foot blue garden hose. Be on the lookout for letters from the Internal Revenue Service.
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The New York Stock Exchange was established by a group of investors in New York City in 1817 under a buttonwood tree at the end of a little road named Wall Street.
"A leader is most successful when people barely know he exists. When his work is done, his aim fulfilled, his troops will feel they did it themselves. "

-- Lao-Tzu, philosopher

ANOVA
Analysis of Variance
A PEDestrian's Guide
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