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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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SUBSTITUTE-IN-PRODUCTION

One of two (or more) goods that use the same resource for production in an exclusionary manner. A substitute-in-production is one of two alternatives falling within the other prices determinant of supply. The other is a complement-in-production. An increase in the price of one substitute good causes a decrease in supply for the other.

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Today, you are likely to spend a great deal of time at the confiscated property police auction hoping to buy either a handcrafted bird house or a weathervane with a chicken on top. Be on the lookout for rusty deck screws.
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The Dow Jones family of stock market price indexes began with a simple average of 11 stock prices in 1884.
"Most of the things worth doing in the world had been declared impossible before they were done."

-- Louis D. Brandeis, Supreme Court Justice

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