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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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AVERAGE REVENUE, PERFECT COMPETITION

The revenue received for selling a good per unit of output sold, found by dividing total revenue by the quantity of output. Average revenue often goes by a simpler and more widely used term... price. For a perfectly competitive firm average revenue is also equal to marginal revenue. Average revenue for a perfectly competitive firm is often depicted by a horizontal average revenue curve.

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YELLOW CHIPPEROON
[What's This?]

Today, you are likely to spend a great deal of time at a dollar discount store wanting to buy either a genuine down-filled comforter or a 200-foot blue garden hose. Be on the lookout for vindictive digital clocks with revenge on their minds.
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This isn't me! What am I?

Natural gas has no odor. The smell is added artificially so that leaks can be detected.
"I don't subscribe to the thesis, 'Let the buyer beware,' I prefer the disregarded one that goes, 'Let the seller be honest.'"

-- Isaac Asimov, Author

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