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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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AGGREGATE EXPENDITURES EQUATION An equation that summarizes the four aggregate expenditures on gross domestic product by the four macroeconomic sectors. In the study of Keynesian economics, this equation is commonly used to summarize the demand side of the macroeconomy. The aggregate expenditures equation actually comes in three different versions depending on how many of the four sectors and their expenditures are included.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway hoping to buy either a package of blank rewritable CDs or yellow cotton balls. Be on the lookout for small children selling products door-to-door.
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A thousand years before metal coins were developed, clay tablet "checks" were used as money by the Babylonians.
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"It is very rare that you meet with obstacles in this world (that) the humblest man has not the faculties to surmount. " -- Henry David Thoreau, philosopher
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BJE
Bell Journal of Economics
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