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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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MARKET FOR LEMONS A market adversely selects only lower quality products for exchange. The market for lemons is an illustration of adverse selection that results from asymmetric information. In this market, because buyers have limited information they offer an average price based on the average quality of the goods. Sellers, however, with better information select to sell lower quality products but not higher quality ones. Two methods of address this problem are signalling and screening. Two related information problems are moral hazard and the principal-agent problem.
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ORANGE REBELOON
[What's This?]
Today, you are likely to spend a great deal of time going from convenience store to convenience store wanting to buy either a birthday greeting card for your grandmother or a coffee cup commemorating yesterday. Be on the lookout for defective microphones.
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This isn't me! What am I?
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Natural gas has no odor. The smell is added artificially so that leaks can be detected.
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"When you play, play hard; when you work, don't play at all. " -- Theodore Roosevelt, 26th US president
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FIML
Full Information Maximum Likelihood
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