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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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SHORT RUN, MICROECONOMICS In terms of the microeconomic analysis of production and supply, a period of time in which at least one input under the control of a firm used in the production process is variable and at least one input is fixed. In the short run, the variable input is usually labor and the fixed input is capital. The short-run analysis of production reveals the law of diminishing marginal returns and provides an understanding of the upward-sloping supply curve and the law of supply. This is one of four production time periods used in the study of microeconomics. The other three are long run, very long run, and very short run (or market period). The short run is also a time period designation used in the macroeconomic analysis of business cycles.
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A Tycoon Of The MUTUAL FUNDSWinston Smythe Kennsington III -- our second-estate financial maestro -- has given me a hot, and I mean REALLY HOT, investment tip. Waldo Industries, the parent company of Waldo's TexMex Taco World, is making plans to expand its franchises. Marketing studies show that people are ripe and ready for Waldo's Super Deluxe TexMex Gargantuan Tacos beyond the confines of Shady Valley. For a minimal investment, I can grab a share of this money-making opportunity. A minimal investment to our Ivy-League friend Winnie is $500,000. Unfortunately my bank account, including recent deposits of loose change found on our pedestrian trek, is a few zeros short. Is this another sure-fire financial opportunity that will pass me by?
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BROWN PRAGMATOX
[What's This?]
Today, you are likely to spend a great deal of time browsing about a thrift store seeking to buy either arch supports for your shoes or an AC adapter that works with your MPG player. Be on the lookout for rusty deck screws.
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This isn't me! What am I?
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In the late 1800s and early 1900s, almost 2 million children were employed as factory workers.
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"If you don't know where you are going, any road will get you there." -- Lewis Carroll, writer
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JET
Journal of Economic Theory
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