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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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INDUSTRY

A group of firms producing goods or services that are close substitutes-in-consumption. The similarity of the products makes it possible to analyze the production in a market framework. An industry can be broadly defined, such as the manufacturing industry, or narrowly specified, such as the root beer industry. For most economic analysis the term industry is used interchangeably with the term market.

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Today, you are likely to spend a great deal of time watching infomercials hoping to buy either a pair of red goulashes with shiny buckles or a handcrafted bird feeder. Be on the lookout for high interest rates.
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