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MARGINAL RETURNS: The change in the quantity of total product resulting from a unit change in a variable input, holding all other inputs fixed. You might recognize this as the definition of marginal product. It is. Marginal returns is an older and more generic term for marginal product. While marginal product has largely replaced marginal returns in most discussions of short-run production, the phrase does persist in a few terms like the law of diminishing marginal returns. When you come upon the phrase marginal returns, more often than not, it's probably referring to marginal product.

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PROFIT CURVE

A curve that graphically represents the relation between the 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. The profit curve is commonly used to illustrate the profit-maximizing quantity of output produced by a firm.

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Today, you are likely to spend a great deal of time at a garage sale wanting to buy either a combination CD player, clock radio, and telephone (with answering machine) or a revolving spice rack. Be on the lookout for neighborhood pets, especially belligerent parrots.
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The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
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