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PERFECT COMPETITION, PROFIT MAXIMIZATION: A perfectly competitive firm is presumed to produce the quantity of output that maximizes economic profit--the difference between total revenue and total cost. This production decision can be analyzed directly with economic profit, by identifying the greatest difference between total revenue and total cost, or by the equality between marginal revenue and marginal cost.

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INJECTIONS LINE

A graphical representation of the relation between the level of aggregate production and one or more injections. The three injections (non-consumption expenditures on aggregate production) are investment expenditures, government purchases and exports. The injections line sequentially adds, or layers, each of these three expenditures depending on the number of sectors used in the analysis (two, three, or four). The slope of the injections line depends on which if any of the expenditures are induced by aggregate production. The injections line is combined with the leakages line (containing saving, taxes, and imports) in the Keynesian injections-leakages model.

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RED AGGRESSERINE
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Today, you are likely to spend a great deal of time lost in your local discount super center wanting to buy either a bookshelf that will fit in your closet or a birthday greeting card for your grandfather. Be on the lookout for the last item on a shelf.
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
"People of mediocre ability sometimes achieve outstanding success because they don't know when to quit. Most men succeed because they are determined to. "

-- George Allen, U.S. senator

JIE
Journal of Industrial Economics
A PEDestrian's Guide
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