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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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PRICE CEILING

A legally established maximum price that is imposed on a market BELOW the price that otherwise would be achieved in equilibrium. A price ceiling is placed on a market with the goal of keeping the price low, presumably based on the notion that the equilibrium price is too high. If imposed on a competitive market free of market failures, a price ceiling creates a shortage, or excess demand.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius trying to buy either a decorative windchime with plastic or a flower arrangement for that special day for your mother. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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The New York Stock Exchange was established by a group of investors in New York City in 1817 under a buttonwood tree at the end of a little road named Wall Street.
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