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OLIGOPOLY, CONCENTRATION: Oligopoly is a market structure that contains a small number of relatively large firms, meaning oligopoly markets tend to be concentrated. A small number of large firms account for a majority of total output. Concentration unto itself is not necessarily bad, but it often leads to inefficient behavior, such as collusion and nonprice competition. Concentration is measured in three ways--market share, concentration ratio, Herfindahl index.

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MARGINAL PROPENSITY FOR GOVERNMENT PURCHASES

The change in government purchases induced by a change in income or production (national income or gross domestic product). The marginal propensity for government purchases (abbreviated MPG) is another term for the slope of the government purchases line and is calculated as the change in government purchases divided by the change in income or production. The MPG plays a role in Keynesian economics. It augments the slope of the aggregate expenditures line and is part of the multiplier process. A related marginal measure is the marginal propensity to consume.

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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time at a dollar discount store seeking to buy either a box of multi-colored, plastic paper clips or several orange mixing bowls. Be on the lookout for broken fingernail clippers.
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Much of the $15 million used by the United States to finance the Louisiana Purchase from France was borrowed from European banks.
"Plans are only good intentions unless they immediately degenerate into hard work."

-- Peter Drucker, management consultant

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Average Revenue, Autoregressive
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