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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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INFLATION RATE

The percentage change in the price level from one period to the next. The inflation rate is most commonly presented as an annual average, the percentage change in the average price level from one year to the next. The two most common price indexes used to measure the price level and the inflation rate are the Consumer Price Index (CPI) and the GDP price deflator. The inflation rate is one of several key indicators of business-cycle instability and the overall health of the macroeconomy, with primary focus on tracking the goal of price stability.

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Today, you are likely to spend a great deal of time strolling through a department store wanting to buy either a wall poster commemorating the first day of winter or blue cotton balls. Be on the lookout for neighborhood pets, especially belligerent parrots.
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The wealthy industrialist, Andrew Carnegie, was once removed from a London tram because he lacked the money needed for the fare.
"It is not the mountain we conquer, but ourselves. "

-- Sir Edmund Hillary, Explorer

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Autoregressive Conditional Heteroskedasticity
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