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BARRIER TO ENTRY: An institutional, government, technological, or economic restriction on the entry of firms into a market or industry. The four primary barriers to entry are: resource ownership, patents and copyrights, government restrictions, and start-up costs. Barriers to entry are a key reason for market control and the inefficiency that this generates. In particular, monopoly, oligopoly, monopsony, and oligopsony often owe their market control to assorted barriers to entry. By way of contrast, perfect competition, monopolistic competition, and monopsonistic competition have few if any barriers to entry and thus little or no market control.

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INDUCED CONSUMPTION

Household consumption expenditures that depend on income or production (especially disposable income, national income, or even gross domestic product). That is, changes in income induce changes in consumption. Induced consumption captures the fundamental psychological law put forth by John Maynard Keynes. It is measured by the marginal propensity to consume (MPC) and is reflected by the positive slope of consumption line. The alternative to induced consumption is autonomous consumption, which does not depend on income.

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Today, you are likely to spend a great deal of time browsing about a thrift store seeking to buy either decorative celebrity figurines or a flower arrangement with anything but tulips for your grandfather. Be on the lookout for telephone calls from long-lost relatives.
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Paper money used by the Commonwealth of Massachusetts prior to the U.S. Revolutionary War, which was issued against the dictates of Britain, was designed by patriot and silversmith, Paul Revere.
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