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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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AGGREGATE DEMAND SHIFTS

Changes in the aggregate demand determinants cause the aggregate demand curve to shift. The mechanism is comparable to that for market demand determinants and market demand. There are two alternatives--an increase in aggregate demand and a decrease in aggregate demand. An increase in spending by any of the four sectors--household, business, government, and foreign--shifts the aggregate demand curve to right. A decrease in spending by these four sectors shifts the aggregate demand curve to left.

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APLS

PINK FADFLY
[What's This?]

Today, you are likely to spend a great deal of time looking for a downtown retail store trying to buy either a tall storage cabinet with five shelves and a secure lock or a birthday greeting card for your grandmother. Be on the lookout for jovial bank tellers.
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This isn't me! What am I?

A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
"When your values are clear to you, making decisions becomes easier. "

-- Roy Disney, executive

MPP
Marginal Physical Product
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