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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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INVESTMENT, PRODUCTION POSSIBILITIES

Investment typically refers to the purchase of productive capital by business in anticipation of increasing production and (presumably) generating more profit. More generally, investment can be considered as sacrificing the current satisfaction of wants and needs (consumption goods) to expand productive capability (capital goods). Production possibilities analysis can be used to illustrate the tradeoff between consumption and capital as a movement along a production possibilities curve.

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Today, you are likely to spend a great deal of time watching the shopping channel trying to buy either a pair of gray heavy duty boot socks or a 50-foot blue garden hose. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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In the early 1900s around 300 automobile companies operated in the United States.
"Use, do not abuse; neither abstinence nor excess ever renders man happy."

-- Voltaire, philosopher

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