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BARTER: A method of trading goods, commodities, or services, directly for one another without the use of money. In a barter exchange one good is traded directly for another. This sort of exchange ultimately requires a double coincidence of wants, meaning that each trader has what the other trader wants and wants what the other has. Without a double coincidence of wants the exchange process can become exceedingly complex, requiring a great deal of resources to complete transactions, resources that can not be used for production. In fact, inefficient barter trading was the primary reason that money was invented. With money, more resources can be used for production and fewer are needed for trading.
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CHANGE IN QUANTITY DEMANDED A movement along a given demand curve caused by a change in demand price. The only factor that can cause a change in quantity demanded is price. A related, but distinct, concept is a change in demand.
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Today, you are likely to spend a great deal of time at the confiscated property police auction seeking to buy either clothing for your pet iguana or a set of hubcaps. Be on the lookout for telephone calls from long-lost relatives.
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The average bank teller loses about $250 every year.
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