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POINT ELASTICITY: The relatively responsiveness of a change in one variable (call it B) to an infinitesimally small change in another variable (call it A). The notion of point elasticity typically comes into play when discussing the elasticity at a specific point on a curve.< P>Point elasticity can be calculated in a number of different ways. Sophisticated economists, using sophisticated mathematical techniques (better known as calculus) can calculate point elasticity by taking derivatives of equations. Derivatives is fancy calculus talk for infinitesimally small changes.

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FREE LUNCH

The consumption of hunger-satisfying food products during the middle of the day, usually around the noon hour, the acquisition of which requires no payment by the consumer and presumably imposes no opportunity cost on society. The food is lunch, the acquisition is free, hence free lunch.

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Today, you are likely to spend a great deal of time flipping through the yellow pages seeking to buy either a remote controlled sports car with an air spoiler or semi-gloss photo paper that works with your neighbor's printer. Be on the lookout for the happiest person in the room.
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There were no banks in colonial America before the U.S. Revolutionary War. Anyone seeking a loan did so from another individual.
"Live in such a way that you would not be ashamed to sell your parrot to the town gossip."

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