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LONG-RUN MARGINAL COST: The change in the long-run total cost of producing a good or service resulting from a change in the quantity of output produced. Like all marginals, long-run marginal cost is the increment in the corresponding total. What's most notable about long-run marginal cost, however, is that we are operating in the long run. Unlike the short run, in which at least one input is fixed, there are no fixed inputs in the long run. As such, there is only variable cost. This means that long-run marginal cost is the result of changes in the cost of all inputs.
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                           TOTAL REVENUE CURVE, PERFECT COMPETITION: A curve that graphically represents the relation between the total revenue received by a perfectly competitive firm for selling its output and the quantity of output sold. It is combined with a perfectly competitive firm's total cost curve to determine economic profit and the profit maximizing level of production. The slope of the total revenue curve is marginal revenue. Perfect competition is a market structure with a large number of small firms, each selling identical goods. Perfectly competitive firms have perfect knowledge and perfect mobility into and out of the market. These conditions mean perfectly competitive firms are price takers, they have no market control and receive the going market price for all output sold.The total revenue curve reflects the degree of market control held by a firm. For a perfectly competitive firm with no market control, the total revenue curve is a straight line. For firms with more market control, especially monopoly, the total revenue curve is "hump shaped," increasing, reaching a peak, then declining. The slope of this total revenue curve is marginal revenue. Total Revenue Curve,
Zucchini Style |  |
Total revenue is commonly represented by a total revenue curve, such as the one displayed in the exhibit to the right. This particular total revenue curve is that for zucchini sales by Phil the zucchini grower. The vertical axis measures total revenue and the horizontal axis measures the quantity of output (pounds of zucchinis). Although quantity on this particular graph stops at 10 pounds of zucchinis, the nature of perfect competition indicates it could go higher. This curve indicates that if Phil sells 1 pound of zucchinis, then he receives $4 of total revenue. Alternatively, if he sells 10 pounds, then he receives $40 of total revenue. Should he sell 100 pounds, then he would move well beyond the graph, with $400 of total revenue. The "curve" is actually a "straight line" because Phil is a price taker in the zucchini market. He receives $4 for each pound of zucchinis sold whether he sells 1 pound or 10 pounds. The constant price is what makes Phil's total revenue curve a straight line.
Recommended Citation:TOTAL REVENUE CURVE, PERFECT COMPETITION, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2026. [Accessed: September 8, 2026].
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Today, you are likely to spend a great deal of time wandering around the downtown area hoping to buy either galvanized steel storage shelves or a large green chalkboard shaped like the state of Maine. Be on the lookout for infected paper cuts.
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Parker Brothers, the folks who produce the Monopoly board game, prints more Monopoly money each year than real currency printed by the U.S. government.
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"In a time of drastic change, it is the learners who inherit the future. " -- Eric Hoffer, philosopher
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PVR
Profit Volume Ratio
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