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MARKET STRUCTURE CONTINUUM: A diagram illustrating alternative degrees of market control held by different types of market structures based on the number of firms in the market and the degree of competitiveness. As the number of competitors along the continuum ranges from one to many, the degree of market control ranges complete to none. At one end of the continuum, with many competitors on no market control, is perfect competition. At the other end, with one competitor and complete market control, is monopoly. Oligopoly and monopolistic competition comprise the interior of the continuum, with monopolistic competition having many competitors but limited market control and oligopoly having few competitors and greater market control. The continuum illustrates that clear-cut dividing lines really do not exist between the market structures, especially for monopolistic competition and oligopoly.
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SIGNALLING When confronted by asymmetric information, the use of small bits of information, or indicators, that suggest more comprehensive information. Signalling is used by those with more information to reduce the cost of informing those with less information. It is commonly used in markets with adverse selection. Methods of signalling include advertising, brand names, and warranties. A related method is screening.
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YELLOW CHIPPEROON
[What's This?]
Today, you are likely to spend a great deal of time surfing the Internet trying to buy either a flower arrangement in a coffee cup for your father or a how-to book on meeting people. Be on the lookout for gnomes hiding in cypress trees.
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Rosemary, long associated with remembrance, was worn as wreaths by students in ancient Greece during exams.
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"To sit back and let fate play its hand out, and never influence it, is not the way man was meant to operate." -- John Glenn, astronaut, U.S. senator
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BJE
Bell Journal of Economics
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