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ABSTRACTION METHODS: Abstraction is the process of simplifying the complexities of the real world by ignoring (hopefully) unimportant details, especially (for our purposes) while doing economic analysis. Three common methods of actual, real world abstraction used in economic theories are words, graphs, and equations. Words can be misunderstood. Graphs are a little more precise. And equations tend to be the most precise of the three.

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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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APLS

GREEN LOGIGUIN
[What's This?]

Today, you are likely to spend a great deal of time browsing about a thrift store hoping to buy either a country wreathe or galvanized steel storage shelves. Be on the lookout for letters from the Internal Revenue Service.
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This isn't me! What am I?

A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
"Do not go where the path may lead, go instead where there is no path and leave a trail."

-- Ralph Waldo Emerson

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Weak Axiom of Cost Minimization
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