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LERNER INDEX: The difference between price (p) and marginal cost (mc) as a fraction of price, that is [p-mc]/p. The Lerner index is usually taken as an indicator of market power because the larger the index, the larger the difference between price and marginal cost, that is, the larger the distance between the price and the competitive price. The Lerner index depends on the elasticity of demand. The Lerner index is also called the price-cost margin.

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FIRST RULE OF SCARCITY

The first of seven basic rules of the economy, stating that the world is faced with limited resources but unlimited wants and needs satisfied from these resources. Scarcity is THE economy problem upon which the entire study of economics is built. A primary implication of scarcity is that the pursuit of an activity results in an opportunity cost.

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Today, you are likely to spend a great deal of time at a flea market looking to buy either a key chain with a built-in flashlight and panic button or a green and yellow striped sweater vest. Be on the lookout for vindictive digital clocks with revenge on their minds.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
"My father used to say to me, „Whenever you get into a jam, whenever you get into a crisis or an emergency . . .become the calmest person in the room and you'll be able to figure your way out of it. "

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