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ARC ELASTICITY: The average elasticity for discrete changes in two variables, A and B. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of the initial and ending values of each variable, rather than only initial values. Arc elasticity is generally calculated using the midpoint formula. Arc elasticity should be compared with point elasticity. For infinitesimally small changes in variables A and B, arc elasticity is the same as point elasticity.

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TIGHT MONEY

A general condition of the economy in which money is not relatively abundant nor plentiful. In modern times, this condition arises when the monetary authority (Federal Reserve System) undertakes contractionary monetary policy. With tight money, interest rates are generally higher and inflation tends to remain low. The alternative to tight money is easy money.

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BLUE PLACIDOLA
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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers trying to buy either a T-shirt commemorating the first day of winter or software that won't crash your computer. Be on the lookout for strangers with large satchels of used undergarments.
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Cyrus McCormick not only invented the reaper for harvesting grain, he also invented the installment payment for selling his reaper.
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