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ENTRY BARRIERS: Institutional, government, technological, or economic restrictions 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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COMMODITY MONEY A medium of exchange (money) that has both value in use and value in exchange. Commodity money is first and foremost a commodity that provides users with satisfaction of their wants and needs. However, it also has the secondary function of acting as a medium of exchange for the economy. In the march toward economic complexity, commodity money emerged from barter exchanges, but then ultimately gave way to modern fiat money.
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RED AGGRESSERINE
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Today, you are likely to spend a great deal of time at a garage sale wanting to buy either a toaster oven that has convection cooking or a birthday gift for your mother. Be on the lookout for attractive cable television service repair people.
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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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"How wonderful it is that nobody need wait a single moment before starting to improve the world." -- Anne Frank
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NI
National Income, Net Income
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