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VARIABLE INPUT: An input whose quantity can be changed in the time period under consideration. This should be immediately compared and contrasted with fixed input. The most common example of a variable input is labor. A variable input provides the extra inputs that a firm needs to expand short-run production. In contrast, a fixed input, like capital, provides the capacity constraint in production. As larger quantities of a variable input, like labor, are added to a fixed input like capital, the variable input becomes less productive. This is, by the way, the law of diminishing marginal returns.
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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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YELLOW CHIPPEROON
[What's This?]
Today, you are likely to spend a great deal of time watching the shopping channel hoping to buy either a small palm tree that will fit on your coffee table or several magazines on fashion design. Be on the lookout for small children selling products door-to-door.
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This isn't me! What am I?
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John Maynard Keynes was born the same year Karl Marx died.
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"The shifts of fortune test the reliability of friends. " -- Marcus Tullius Cicero, Roman statesman
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AEC
Annual Equivalent Costs
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