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PERFECT COMPETITION AND DEMAND: The demand curve for the output produced by a perfectly competitive firm is perfectly elastic at the going market price. The firm can sell all of the output that it wants at this price because it is a relatively small part of the market. As a price taker, the firm has no ability to charge a higher price and no reason to charge a lower one. The market price facing a perfectly competitive firm is also the firm's average revenue and, most importantly, its marginal revenue.

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LONG-RUN MARGINAL COST

The change in the long-run total cost of producing a good or service resulting from a change in the quantity of output produced. Like all marginals, long-run marginal cost is an increment of the corresponding total. It is the change in long-run total cost divided by, or resulting from, a change in quantity. Long-run marginal cost is guided by returns to scale rather than marginal returns.

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PINK FADFLY
[What's This?]

Today, you are likely to spend a great deal of time wandering around the shopping mall hoping to buy either a microwave over that won't burn your popcorn or a T-shirt commemorating the first day of winter. Be on the lookout for pencil sharpeners with an attitude.
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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."
"Give the American people a good cause, and there's nothing they can't lick. "

-- John Wayne, actor

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Consumer Price Index-All Urban Consumers
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