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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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ENDPOINT ELASTICITY FORMULA

A simple technique for calculating the coefficient of elasticity by estimating the elasticity for discrete changes in two variables using the initial values of each. The distinguishing characteristic of this formula is that percentage changes are calculated based on the initial values of each variable. An alternative technique is the midpoint elasticity formula.

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Today, you are likely to spend a great deal of time at the confiscated property police auction looking to buy either storage boxes for your summer clothes or 500 feet of coaxial cable. Be on the lookout for poorly written technical manuals.
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The first paper notes printed in the United States were in denominations of 1 cent, 5 cents, 25 cents, and 50 cents.
"There's a very positive relationship between people's ability to accomplish any task and the time they're willing to spend on it."

-- Dr. Joyce Brothers

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