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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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SEVENTH RULE OF COMPLEXITY

The seventh of seven basic rules of the economy, stating that every action in the complex world has direct and often intended consequences combined with indirect and probably unintended effects.

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YELLOW CHIPPEROON
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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers seeking to buy either a birthday greeting card for your father or a T-shirt commemorating the first day of spring. Be on the lookout for cardboard boxes.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
"Difficulties mastered are opportunities won. "

-- Winston Churchill, Statesman

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