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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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ECONOMIC SYSTEM

The assorted institutions that society uses to answer the three basic questions of allocation and address the fundamental problem of scarcity. Another, more popular term for economic system is economy. An economy, or economic system, is the structural framework in which households, businesses, and governments undertake the production and consumption decisions that allocate limited resources to satisfy unlimited wants and needs.

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PURPLE SMARPHIN
[What's This?]

Today, you are likely to spend a great deal of time at the confiscated property police auction seeking to buy either a video camera with stop action features or one of those memory foam pillows. Be on the lookout for the last item on a shelf.
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Three-forths of the gold mined each year is used to manufacture jewelry.
"The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather a lack of will. "

-- Vince Lombardi

NAG
Net Annual Gain
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