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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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FIAT MONEY A medium of exchange (money) with value in exchange, but little or no value in use. Modern paper currency, coins, and checkable deposits are fiat money. The value of fiat money comes from the public's general willingness to accept it in exchange for other goods. This willingness comes from the fact that EVERYONE is willing to accept fiat money in exchange, which largely depends on the public's confidence in the authority (usually government) issuing the fiat money. Fiat money is NOT valuable unto itself, but it is valuable for what it can buy. In the march toward economic complexity, fiat money emerged from commodity money, money with both value in exchange and value in use.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time at a dollar discount store trying to buy either a remote controlled World War I bi-plane or a wall poster commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki. Be on the lookout for a thesaurus filled with typos.
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This isn't me! What am I?
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
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"You need just the right amount of ambition . . . If you have too little ambition, you don't push or work hard. If you have too much ambition, you put yourself ahead of others, elbow them out of your way. " -- Andy Grove, Intel chairman and co-founder
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ARIMA
Autoregressive Integrated Moving Average
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