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July 9, 2025 

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VALUE IN EXCHANGE: The ability to trade an item, especially money, for other goods and services that can then be used to satisfy wants and needs. Value in exchange means that value, that is satisfaction, is obtained indirectly through the acquisition of something else. For an item to have value in exchange it need NOT have value in use, value obtained directly from the consumption of a good or service.

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FOUR-FIRM CONCENTRATION RATIO: The proportion of total output in an industry that's produced by the four largest firms in the industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. The four-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and how market control is held by the four largest firms in the industry.

     See also | concentration ratio | eight-firm concentration ratio | market share | market control | oligopoly | monopolistic competition |


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FOUR-FIRM CONCENTRATION RATIO, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: July 9, 2025].


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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 searching for rummage sales looking to buy either a 200-foot blue garden hose or a video camera with stop action features. Be on the lookout for high interest rates.
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A communal society, a prime component of Karl Marx's communist philosophy, was advocated by the Greek philosophy Plato.
"All labor that uplifts humanity has dignity and importance and should be undertaken with painstaking excellence. "

-- Martin Luther King Jr., civil rights leader

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