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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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EXPENDITURES MULTIPLIER A measure of the change in aggregate production caused by changes in an autonomous expenditure. The expenditures multiplier is the inverse of one minus the slope of the aggregate expenditures line. The simple expenditures multiplier includes ONLY induced consumption. More complex expenditures multipliers include other induced components. Two related multipliers are the tax multiplier, which measures the change in aggregate production caused by changes in taxes, and the balanced-budget multiplier which measures the change in aggregate production from equal changes in both taxes and government purchases.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway hoping to buy either a small, foam rubber football or an instructional DVD on learning to the play the oboe. Be on the lookout for the happiest person in the room.
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This isn't me! What am I?
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The standard "debt" notation I.O.U. does not mean "I owe you," but actually stands for "I owe unto..."
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"Whenever you fall, pick up something. " -- Oswald Avery, scientist
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Average Physical Product
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