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PRICE DISCRIMINATION: Charging different prices to different buyers for the same good. This is an age old practice for suppliers who have achieved some degree of market control, especially those with a monopoly. The reason for price discrimination, of course, is higher profit. To be a successful price discriminator you must be able to do three things--(1) have market control and be a price maker, (2) identify two or more groups that are willing to pay different prices, and (3) keep the buyers in one group from reselling the good to another group. In this way, you will be able to charge each group what they, and they alone, are willing to pay.

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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 surfing the Internet looking to buy either a birthday greeting card for your grandfather or a weathervane with a cow on top. Be on the lookout for slightly overweight pizza delivery guys.
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A communal society, a prime component of Karl Marx's communist philosophy, was advocated by the Greek philosophy Plato.
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