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BARTER EXCHANGE: 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. See market.

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COMPARATIVE ADVANTAGE

The ability to produce one good at a relatively lower opportunity cost than other goods, especially compared to production in another country. Every person or country has a comparative advantage in production of at least one good or service, even with relatively limited production technology. A related, but contrasting concept is absolute advantage. Both terms are perhaps most important to the study of international trade, but also provide insight into other exchanges.

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YELLOW CHIPPEROON
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Today, you are likely to spend a great deal of time flipping through the yellow pages hoping to buy either a flower arrangement with anything but tulips for your grandfather or a birthday greeting card for your mother that doesn't look like a greeting card. Be on the lookout for mail order catalogs with hidden messages.
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This isn't me! What am I?

The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
"If we all did the things we are capable of doing, we would literally astound ourselves."

-- Thomas Edison

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