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SAVING-INVESTMENT EQUALITY: A classical economic proposition stating that flexible prices ensure an equality between saving and investment. This equality is essential to obtain the classical economic conclusion that unrestricted markets achieve and maintain full employment. This is one of the three assumptions underlying classical economics. The other two assumptions are flexible prices and Say's law.

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ARC ELASTICITY

The average elasticity for discrete changes in two variables. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of initial and ending values of each variable, rather than initial values. Arc elasticity is generally calculated using the midpoint elasticity formula. The contrast to arc elasticity is point elasticity. For infinitesimally small changes in two variables, arc elasticity is the same as point elasticity.

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Today, you are likely to spend a great deal of time touring the new suburban shopping complex seeking to buy either a birthday greeting card for your grandfather or a weathervane with a cow on top. Be on the lookout for telephone calls from former employers.
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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.
"Success is going from failure to failure without a loss of enthusiasm. "

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