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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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IMPLICIT COLLUSION

Seemingly independent, but parallel, actions among competing firms (mostly oligopolistic firms) in an industry designed to control the market, raise the price, and otherwise act like a monopoly. Also termed tacit collusion, the distinguishing feature of implicit collusion is the lack of any explicit agreement. This is one of two types of collusion. The other is explicit or overt collusion, which involves an explicit agreement.

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Today, you are likely to spend a great deal of time surfing the Internet wanting to buy either a wall poster commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki or decorative garden figurines. Be on the lookout for slightly overweight pizza delivery guys.
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Much of the $15 million used by the United States to finance the Louisiana Purchase from France was borrowed from European banks.
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GARCH
Generalized Autoregressive Conditional Heteroskedasticity
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