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ELASTIC: In general, if changes in variable A cause changes in variable B, then the relative change in B is greater than the relative change in A. In other words, small changes in variable A cause relatively larger changes in variable B. An elastic relationship between two variables is a very responsive, or stretchable, relationship. You should compare elastic with inelastic.

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MARGINAL REVENUE, PERFECT COMPETITION

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a perfectly competitive firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a perfectly competitive firm equates marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time at a garage sale wanting to buy either a weathervane with a cow on top or a box of multi-colored, plastic paper clips. Be on the lookout for celebrities who speak directly to you through your television.
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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.
"Anyone who has never made a mistake has never tried anything new. "

-- Albert Einstein, physicist

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