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PPF: The abbreviation for production possibilities frontier, which is a curve that illustrates the production possibilities for the economy. A production possibilities frontier represents the boundary or frontier of the economy's production capabilities. That's why it's termed a production possibilities frontier (or PPF). As a frontier, it is the maximum production possible given existing (fixed) resources and technology. Producing on the curve means resources are fully employed, while producing inside the curve means resources are unemployed. The law of increasing opportunity cost is what gives the curve its distinctive convex shape.

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PHYSICAL WEALTH, AGGREGATE EXPENDITURES DETERMINANT

One of several specific aggregate expenditures determinants assumed constant when the aggregate expenditures line is constructed, and that shifts the aggregate expenditures line when it changes. A decrease in physical wealth causes an increase (upward shift) of the aggregate expenditures line. An increase in physical wealth causes a decrease (downward shift) of the aggregate expenditures line. Other notable aggregate expenditures determinants include consumer confidence, federal deficit, inflationary expectations, and exchange rates.

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Today, you are likely to spend a great deal of time at a garage sale seeking to buy either a cross-cut paper shredder or a birthday greeting card for your father. Be on the lookout for strangers with large satchels of used undergarments.
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There were no banks in colonial America before the U.S. Revolutionary War. Anyone seeking a loan did so from another individual.
"Divide each difficulty into as many parts as is feasible and necessary to resolve it."

-- Rene Descartes

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