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February 17, 2026 

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ECONOMIES OF SCALE: Declining long-run average cost that occurs as a firm increases all inputs and expands its scale of production. This is graphically illustrated by a negatively-sloped long-run average cost curve and typically occurs for relatively small levels of production. Economies of scale are then overwhelmed by diseconomies of scale for relatively large production levels. Together, economies of scale and diseconomies of scale cause the long-run average cost curve to be U-shaped.

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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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Today, you are likely to spend a great deal of time at a garage sale looking to buy either any book written by Isaac Asimov or a how-to book on building remote controlled airplanes. Be on the lookout for crowded shopping malls.
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Ragnar Frisch and Jan Tinbergen were the 1st Nobel Prize winners in Economics in 1969.
"Stand up to your obstacles and do something about them. You will find that they haven't half the strength you think they have."

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