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ABSTRACTION: Simplifying the complexities of the real world by ignoring (hopefully) unimportant details while doing economic analysis. Abstraction is often criticized because it's, well, it's JUST NOT REALISTIC. However, when done correctly (ignoring things that JUST DON'T MATTER), then the pursuit of knowledge is greatly enhanced by abstraction. For example, when travelling cross country along a high-speed interstate highway, a paper road map is a handy tool. It shows towns and cities along the way, the major intersections, rest stop locations, and other important points of interest. However, it ignores unimportant details. It doesn't realistically show the location of every tree, bush, or blade of grass. Why bother? This information won't enhance your road trip.
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CONSUMPTION RIVALRY Whether or not the consumption of a particular good by one person prevents simultaneous consumption by another person. In other words, does consumption impose an opportunity cost on others. Rival consumption occurs if the consumption by one imposes an opportunity cost on others because others are prevented from consuming the good. Nonrival consumption occurs if the consumption by one does not impose an opportunity cost on others because others are not prevented from consuming the good. When combined with nonpayer excludability, the result is four alternative types of goods -- private, public, common-property, and near-public.
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YELLOW CHIPPEROON
[What's This?]
Today, you are likely to spend a great deal of time calling an endless list of 800 numbers seeking to buy either a half-dozen helium filled balloons or a packet of address labels large enough for addresses of both the sender and the recipient. Be on the lookout for celebrities who speak directly to you through your television.
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This isn't me! What am I?
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North Carolina supplied all the domestic gold coined for currency by the U.S. Mint in Philadelphia until 1828.
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"So many of our dreams at first seem impossible, then they seem improbable, and then when we summon the will, they soon become inevitable." -- Christopher Reeve, Actor
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AFBD
Association of Futures Brokers and Dealers (UK)
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