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CHANGE IN QUANTITY DEMANDED: The movement along a demand curve caused by a change in the price of the good. This should be contrasted directly with a change in demand. You might also want to review the terms change in quantity supplied and change in supply, as well. A change in quantity demanded means that we have identified a NEW quantity on the existing demand curve. In contrast, a change in demand means that we have changed, moved, or shifted, the entire demand curve, the whole range of prices and quantities has changed.

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PERFECT COMPETITION, LONG-RUN PRODUCTION ANALYSIS

In the long run, a perfectly competitive firm adjusts plant size, or the quantity of capital, to maximize long-run profit. In addition, the entry and exit of firms into and out of a perfectly competitive market guarantees that each perfectly competitive firm earns nothing more or less than a normal profit. As a perfectly competitive industry reacts to changes in demand, it traces out positive, negative, or horizontal long-run supply curve due to increasing, decreasing, or constant cost.

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BEIGE MUNDORTLE
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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 coffee cup commemorating next Thursday or a replacement remote control for your stereo system. Be on the lookout for strangers with large satchels of used undergarments.
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Two and a half gallons of oil are needed to produce one automobile tire.
"The greatest things ever done on Earth have been done little by little. "

-- William Jennings Bryan

IRR
Internal Rate of Return
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