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HOMOGENEOUS GOOD: Goods that are either physically identical or at least viewed as identical by buyers. In particular, the producer of a good can not be identified from the good itself. This is a key assumption underlying the perfect competition market structure, and like other assumptions is only approximated in the real world. Agricultural products, metals, and energy goods come as close as any in the real world.

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ADVERSE SELECTION

An inefficient, bad, or adverse outcome of a market exchange that results because buyers and/or sellers make decisions based on asymmetric information. This commonly results in a market that exchanges a lesser quality good, what is termed the market for lemons. Two related problems resulting from asymmetric information are moral hazard and the principal-agent problem. Two methods of lessoning the problem of adverse selection are signalling and screening.

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PURPLE SMARPHIN
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Today, you are likely to spend a great deal of time at a going out of business sale seeking to buy either handcrafted decorations to hang on your walls or throw pillows for your bed. Be on the lookout for cardboard boxes.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
"Difficulties mastered are opportunities won. "

-- Winston Churchill, Statesman

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Weak Axiom of Profit Maximization
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