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THREE-SECTOR INJECTIONS-LEAKAGES MODEL: A model used to identify equilibrium in Keynesian economics based on injections (investment and government purchases) and leakages (saving and taxes) for the three domestic sectors (household, business, and government). Equilibrium is achieved at the intersection of the saving and tax line, S + T, and the investment and government purchases line, I + G.

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AVERAGE TOTAL COST

Total cost per unit of output, found by dividing total cost by the quantity of output. When compared with price (per unit revenue), average total cost (ATC) indicates the per unit profitability of a profit-maximizing firm. Average total cost is one of three average cost concepts important to short-run production analysis. The other two are average fixed cost and average variable cost. A related concept is marginal cost.

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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors trying to buy either shoe laces for your snow boots or a rim for your spare tire. Be on the lookout for poorly written technical manuals.
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Lombard Street is London's equivalent of New York's Wall Street.
"Anyone who has never made a mistake has never tried anything new. "

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