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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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INFORMATION SEARCH

The decision to seek out or produce information based on a comparison of the cost of acquiring the information and the benefit obtained from the information. Efficient information search is achieved with a equality between the marginal cost of search and the marginal benefit of search. Because the marginal cost of search is invariably greater than zero, search effort stops short of acquiring complete information.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius hoping to buy either a velvet painting of Elvis Presley or a wall poster commemorating yesterday. Be on the lookout for broken fingernail clippers.
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The average bank teller loses about $250 every year.
"The time to repair the roof is when the sun is shining."

-- John F. Kennedy, 35th U. S. president

MRP
Marginal Revenue Product
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