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LONG-RUN AVERAGE COST: The per unit cost of producing a good or service in the long run when all inputs are variable. In other words, long-run total cost divided by the quantity of output produced. Long-run average cost is based on economies of scale (or increasing returns to scale) and diseconomies of scale (or decreasing returns to scale).

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PROFIT CURVE: A curve that graphically represents the relation between economic profit earned by a firm and the quantity of output sold. This curve is constructed to capture the relation between profit and the level of output, holding other variables, especially those affecting the total revenue and total cost curves, constant. This is one of three methods typically used to determine the profit-maximizing quantity of output produced by a firm. The other two methods are total revenue and total cost and marginal revenue and marginal cost.

     See also | profit | perfect competition | short-run production | firm | quantity | total revenue | total cost | profit maximization | production | marginal revenue | marginal cost | profit curve, monopolistic competition | profit curve, monopoly |


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PROFIT CURVE, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2026. [Accessed: January 20, 2026].


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AGGREGATE EXPENDITURES

The total expenditures on gross domestic product undertaken in a given time period by the four sectors--household, business, government, and foreign. Expenditures made by each of these sectors are commonly termed consumption expenditures, investment expenditures, government purchases, and net exports. Aggregate expenditures (AE) are a cornerstone in the study of macroeconomics, playing critical roles in Keynesian economics, aggregate market analysis, and to a lesser degree, monetarism. In particular, aggregate expenditures are combined with the price level as aggregate demand.

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