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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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SCARCITY

A pervasive condition of human existence that results because society has unlimited wants and needs, but limited resources used for their satisfaction. This fundamental condition is the common thread that binds all of the topics studied in economics.

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Today, you are likely to spend a great deal of time at the confiscated property police auction trying to buy either a set of hubcaps or handcrafted decorations to hang on your walls. Be on the lookout for gnomes hiding in cypress trees.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"And while the law of competition may be sometimes hard for the individual, it is best for the race, because it ensures the survival of the fittest in every department. "

-- Andrew Carnegie, entrepreneur

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