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June 30, 2022 

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REAL-BALANCE EFFECT: A change in aggregate expenditures on real production made by the household, business, government, and foreign sectors that results because a change in the price level alters the purchasing power of money. This is one of three effects underlying the negative slope of the aggregate demand curve associated with a movement along the aggregate demand curve and a change in aggregate expenditures. The other two are interest-rate effect and net-export effect.

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PERFECT COMPETITION AND SHORT-RUN SUPPLY CURVE: A perfectly competitive firm's supply curve is that portion of its' marginal cost curve that lies above the minimum of the average variable cost curve. A perfectly competitive firm maximizes profit by producing the quantity of output that equates price and marginal cost. As such, the firm moves along it's marginal cost curve in response to alternative prices. Because the marginal cost curve is positively sloped due to the law of diminishing marginal returns, the firm's supply curve is also positively sloped.

     See also | perfect competition | supply curve | short run | law of supply | marginal cost | marginal cost curve | average variable cost | average variable cost curve | law of diminishing marginal returns | monopoly and perfect competition | perfect competition and demand | perfect competition and efficiency | perfect competition characteristics |


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PERFECT COMPETITION AND SHORT-RUN SUPPLY CURVE, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2022. [Accessed: June 30, 2022].


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MARGINAL REVENUE

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a firm equates marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time at a garage sale trying to buy either a wall poster commemorating last Friday (you know why) or a country wreathe. Be on the lookout for high interest rates.
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