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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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Lesson 15: Aggregate Market | Unit 5: Policy Preview Page: 22 of 22

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  • A preview of how the aggregate market is used to analyze government policies.
  • The two alternatives for closing recessionary and inflationary gaps--(1) self correction based on shifts of the automatic SRAS and (2) government policies that induce shifts in the AD, SRAS, and LRAS curves.
  • Questions about the time it takes for the economy to adjust from the short run to the long run.

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CONCENTRATION RATIOS

A family of measures of the proportion of total output in an industry that is produced by a given number of the largest firms in the industry. The two most common concentration ratios are for the four largest firms and the eight largest firms. The four-firm concentration ratio is the proportion of total output produced by the four largest firms in the industry and the eight-firm concentration ratio is proportion of total output produced by the eight largest firms in the industry. Concentration ratios are commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control of the largest firms in the industry. A related measure is the Herfindahl index.

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GRAY SKITTERY
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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers looking to buy either a large, stuffed kitty cat or a cross-cut paper shredder. Be on the lookout for crowded shopping malls.
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Sixty percent of big-firm executives said the cover letter is as important or more important than the resume itself when you're looking for a new job
"When you play, play hard; when you work, don't play at all. "

-- Theodore Roosevelt, 26th US president

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