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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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MICROECONOMIC GOALS

Two conditions of the mixed economy that are most important for microeconomics, including efficiency, and equity, that are generally desired by society and pursued by governments through economic policies.

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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time searching for a specialty store looking to buy either any book written by Isaac Asimov or a how-to book on building remote controlled airplanes. Be on the lookout for deranged pelicans.
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The first "Black Friday" on record, a friday marked by a major financial catastrophe, occurred on September 24, 1869 -- A FRIDAY -- when an attempted cornering of the gold market induced a financial crises and economy-wide depression.
"I have no expectation of making a hit every time I come to bat. What I seek is the highest possible batting average."

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Journal of Economic Theory
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