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TANSTAAFL: A rather cumbersome and usually hard to remember acronym for the expression "There ain't no such thing as a free lunch. This is a favorite saving of many economists because it highlights, albeit in a grammatically questionable manner, the fundamental problem of scarcity. The phrase serves to emphasize that seemingly "free" lunches are not really free. While they might be free to the customer, someone must pay, that is, incur an opportunity cost of foregone production. The lunch eaten by one person cannot be eaten by another.

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PERFECT COMPETITION, 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 average revenue and, most important, marginal revenue.

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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors hoping to buy either a how-to book on surfing the Internet or a computer that can play music and burn CDs. Be on the lookout for crowded shopping malls.
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In 1914, Ford paid workers who were age 22 or older $5 per day -- double the average wage offered by other car factories.
"The majority of men meet with failure because of their lack of persistence in creating new plans to take the place of those that fail. "

-- Napoleon Hill, author

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