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LONG-RUN EQUILIBRIUM, MONOPOLISTIC COMPETITION: Relative freedom of entry and exit ensures that, in the long run, every firm in a monopolistically competitive industry earns exactly a normal profit, receiving neither an economic profit, nor incurring an economic loss. This result is achieved because entry and exit affects the market supply curve, which affects the overall market price, each firm's demand curve, and the range or prices it can charge. Each firm's demand curve adjusts until the profit-maximizing price is exactly equal to average total cost (both short run and long run).

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MARGINAL PROPENSITY TO INVEST

The change in business investment expenditures induced by a change in income or production (national income or gross domestic product). The marginal propensity to invest (abbreviated MPI) is another term for the slope of the investment line and is calculated as the change in investment divided by the change in income or production. The MPI plays a role in Keynesian economics. It augments the slope of the aggregate expenditures line and is part to the multiplier process. A related marginal measure is the marginal propensity to consume.

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PINK FADFLY
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Today, you are likely to spend a great deal of time flipping through the yellow pages trying to buy either a T-shirt commemorating the first day of winter or software that won't crash your computer. Be on the lookout for crowded shopping malls.
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The first U.S. fire insurance company was established by Benjamin Franklin in 1752 in Philadelphia.
"Nearly all men can stand adversity; but if you want to test a manžs character, give him power. "

-- Abraham Lincoln, 16th U.S. President

WPO
Weakly Pareto Optimal
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