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PLANNING HORIZON: Another term for the long-run average cost curve. The long-run average cost curve is termed the planning horizon because it provides information a firm can use to plan factory construction and expansion in the long run.

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PERFECTLY ELASTIC

An elasticity alternative in which infinitesimally small changes in one variable (usually price) cause infinitely large changes in another variable (usually quantity). Quantity is infinitely responsive to price. Any change in price, no matter how small, triggers an infinite change in quantity. This characterization of elasticity is most important for the price elasticity of demand and the price elasticity of supply. Perfectly elastic is one of five elasticity alternatives. The other four are perfectly inelastic, relatively elastic, relatively inelastic, and unit elastic.

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Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway hoping to buy either a rechargeable battery for your computer or shoe laces for your snow boots. Be on the lookout for defective microphones.
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Mark Twain said "I wonder how much it would take to buy soap buble if there was only one in the world."
"Everyone's got it in him, if he'll only make up his mind and stick at it. None of us is born with a stop-valve on his powers or with a set limit to his capacities. There's no limit possible to the expansion of each one of us."

-- Charles M. Schwab

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Marginal Propensity to Save
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