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PHENOMENON: An event or action that is subject to investigation using the scientific method. Phenomena are the sorts of things that science seeks to explain. While the term phenomenon might entice thoughts of UFOs, ghosts, and three-headed turtles, it really just means things that happen, both usual and unusual. The reason for explaining the unusual AND the commonplace is that the scientific method seeks to develop universal theories, with laws and principles that explain all events, not just unexpected ones.

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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 browsing about a thrift store hoping to buy either income tax software or a how-to book on the art of negotiation. Be on the lookout for defective microphones.
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A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
"Don't waste your effort on a thing that results in a petty triumph unless you are satisfied with a life of petty issues. "

-- John D. Rockefeller, industrialist

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