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A POSTERIORI: A conclusion reached through logical reasoning based on facts and observations about the real world. This notion is closely related to the scientific verification of hypotheses and the identification of principles. A similar sounding, but opposite term is a prior, which is a unverified presumption made before an analysis is undertaken. For example, in the study of economics of crime you might assume, a priori, that people are basically "good", and conclude, a posteriori, that people are more likely to commit crimes when the threat of capture and conviction is lower.

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DUOPOLY

An oligopoly market structure containing exactly two firms. As an oligopoly, duopoly exhibits the oligopolistic characteristics and undertakes oligopolistic behavior, such as barriers to entry, interdependent actions, and nonprice competition. While duopoly, in its purest form of EXACTLY two firms in the industry, is seldom found in the real world, it does provide an excellent, easy to use illustration of oligopoly. In fact, most instructional analysis of oligopoly generally assumes a two-firm, duopoly market.

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APLS

ORANGE REBELOON
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Today, you are likely to spend a great deal of time at a flea market wanting to buy either a solid oak entertainment center or a remote controlled ceiling fan. Be on the lookout for letters from the Internal Revenue Service.
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Three-forths of the gold mined each year is used to manufacture jewelry.
"You don't have to be a fantastic hero to do certain things - to compete. You can be just an ordinary chap, sufficiently motivated to reach challenging goals."

-- Sir Edmund Hillary, Explorer

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