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MARGINAL UTILITY: The additional utility, or satisfaction of wants and needs, obtained from the consumption or use of an additional unit of a good. It is specified as the change in total utility divided by the change in quantity. Marginal utility indicates what each additional unit of a good is worth to a consumer.

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PERFECT COMPETITION, CHARACTERISTICS

The four key characteristics of perfect competition are: (1) a large number of small firms, (2) identical products sold by all firms, (3) perfect resource mobility or the freedom of entry into and exit out of the industry, and (4) perfect knowledge of prices and technology.

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RED AGGRESSERINE
[What's This?]

Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club seeking to buy either an AC adapter for your CD player or storage boxes for your family photos. Be on the lookout for slightly overweight pizza delivery guys.
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This isn't me! What am I?

A half gallon milk jug holds about $50 in pennies.
"He who has a „why¾ to live can bear with almost any „how.""

-- Friedrich Nietzsche, Philosopher

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National Bureau of Economic Research
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