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RATE OF RETURN: The ratio of the additional annual income or profit generated by an investment to the cost of the investment. Here's a simple example, although the calculations are usually a great deal more involved for actual investments. If the cost of constructing a new factory is $10 million and it gives you an extra $1 million in profit each year, then its rate of return is 10 percent.

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MARGINAL REVENUE CURVE, PERFECT COMPETITION

A curve that graphically represents the relation between the marginal revenue received by a perfectly competitive firm for selling its output and the quantity of output sold. Because a perfectly competitive firm is a price taker and faces a horizontal demand curve, its marginal revenue curve is also horizontal and coincides with its average revenue (and demand) curve. A perfectly competitive firm maximizes profit by producing the quantity of output found at the intersection of the marginal revenue curve and marginal cost curve.

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Today, you are likely to spend a great deal of time at a going out of business sale looking to buy either a handcrafted bird feeder or a New York Yankees baseball cap. Be on the lookout for strangers with large satchels of used undergarments.
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Three-forths of the gold mined each year is used to manufacture jewelry.
"There is no point at which you can say, „Well, I'm successful now. I might as well take a nap.¾"

-- Carrie Fisher, actress, writer

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