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OPPORTUNITY COST: The highest valued alternative foregone in the pursuit of an activity. This is a hallmark of anything dealing with economics--and life for that matter--because any action that you take prevents you from doing something else. The ultimate source of opportunity cost is the pervasive problem of scarcity (unlimited wants and needs, but limited resources). Whenever limited resources are used to satisfy one want or need, there are an unlimited number of other wants and needs that remain unsatisfied. Herein lies the essence of opportunity cost. Doing one thing prevents doing another.

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ABSTRACTION

Simplifying the complexities of the real world by ignoring (hopefully) unimportant details while doing economic analysis. Abstraction is an essential feature of the scientific method. Hypothesis verification, model construction, and comparative static analysis are not possible without abstraction.

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APLS

GRAY SKITTERY
[What's This?]

Today, you are likely to spend a great deal of time at an auction wanting to buy either a bottle of blackcherry flavored spring water or a travel case for you toothbrush. Be on the lookout for the last item on a shelf.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
"I don't know the key to success, but the key to failure is trying to please everybody. "

-- Bill Cosby

PWAC
Present Worth of Annual Costs
A PEDestrian's Guide
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