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DEMAND ELASTICITY AND TOTAL EXPENDITURE: The notion that price-induced changes in total expenditure for a good (price times quantity) depends on the relative price elasticity of demand. In particular, for relatively elastic demand (1 < E < ∞) changes in price cause total expenditure to change in the opposite direction. An increase in price causes total expenditure to fall and a decrease in price causes total expenditure to rise. For relatively inelastic demand (0 < E < 1) changes in price cause total expenditure to change in the same direction. An increase in price causes total expenditure to rise and a decrease in price causes total expenditure to fall. For unit elastic demand (E =1) price changes do not cause any change in total expenditure. Total expenditure is the same whether price increases or decreases.

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FOREIGN EXCHANGE MARKET

A market that trades the currencies of different countries. The foreign exchange market is actually a series of different markets, each exchanging the currency of one nation for that of another nation. A foreign exchange market sets the price of one currency in terms of the other; a price termed the foreign exchange rate, or simply exchange rate. The impact of government exchange rate policies, including fixed exchange rates, flexible exchange rates, and managed flexible exchange rates, can be illustrated using the foreign exchange market.

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Today, you are likely to spend a great deal of time browsing through a long list of dot com websites seeking to buy either a large green chalkboard shaped like the state of Maine or a replacement battery for your pocket calculator. Be on the lookout for celebrities who speak directly to you through your television.
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The first "Black Friday" on record, a friday marked by a major financial catastrophe, occurred on September 24, 1869 -- A FRIDAY -- when an attempted cornering of the gold market induced a financial crises and economy-wide depression.
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