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May 15, 2026 

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TANGENCY: A geometric condition that occurs when two curves touch at a single point with identical slopes at that point. This condition of tangency surfaces in several different areas of economic analysis, including indifference curve analysis (tangency between an indifference curve and budget line) and monopolistic competition (tangency between demand curve and long-run average cost curve). The tangency between two curves should be contrasted with the condition of intersection, in which two cross at a single point but do not have identical slopes.

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MARGINAL FACTOR COST, PERFECT COMPETITION

The change in total factor cost resulting from a change in the quantity of factor input employed by a perfectly competitive firm. Marginal factor cost, abbreviated MFC, indicates how total factor cost changes with the employment of one more input. It is found by dividing the change in total factor cost by the change in the quantity of input used. Marginal factor cost is compared with marginal revenue product to identify the profit-maximizing quantity of input to hire.

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A Random Walk Through Some ECONOMIC STATISTICS

A pedestrian must always be on guard during any economic excursion, especially when passing the Sylvester J. Peabody Federal Office Building here in Shady Valley. You never know when a window will burst open sending a barrage of glass slivers and economic statistics haphazardly into the street. This is usually followed by a pointy-headed economist who pokes his pointy head through the remaining shards of glass to adamantly declare that there's absolutely, positively NO RECESSION! But he'll recheck the numbers just in case there really is one. WATCH OUT! DUCK!
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Today, you are likely to spend a great deal of time searching for a specialty store wanting to buy either storage boxes for your winter clothes or several magazines on time travel. Be on the lookout for the last item on a shelf.
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Helping spur the U.S. industrial revolution, Thomas Edison patented nearly 1300 inventions, 300 of which came out of his Menlo Park "invention factory" during a four-year period.
"I don't know the key to success, but the key to failure is trying to please everybody. "

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