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PHYSICAL SCIENCE: The scientific study of nonhuman, nonsociety phenomenon, such as atoms, planets, wildlife, and continental drift. Common disciplines that study these physical phenomenon go by the names physics, chemistry, biology, geology, and astronomy, among others. The primary reason for this entry is to provide a contrast with social sciences, especially economics, that study human behavior and society.

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MARGINAL REVENUE PRODUCT

The change in total revenue resulting from a unit change in a variable input, keeping all other inputs unchanged. Marginal revenue product, usually abbreviated MRP, is found by dividing the change in total revenue by the change in the variable input or by multiplying marginal physical product by marginal revenue. This is also termed value of the marginal product. Marginal revenue product is a key concept for understanding the demand for productive inputs.

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Today, you are likely to spend a great deal of time driving to a factory outlet wanting to buy either a black duffle bag with velcro closures or any book written by Isaac Asimov. Be on the lookout for crowded shopping malls.
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Sixty percent of big-firm executives said the cover letter is as important or more important than the resume itself when you're looking for a new job
"Don't judge each day by the harvest you reap, but by the seeds you plant."

-- Robert Louis Stevenson, Author

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