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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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KEYNESIAN ECONOMICS A theory of macroeconomics developed by John Maynard Keynes based on the proposition that aggregate demand is the primary source of business-cycle instability and the most important cause of recessions. Keynesian economics points to discretionary government policies, especially fiscal policy, as the primary means of stabilizing business cycles and tends to be favored by those on the liberal end of the political spectrum. The basic principles of Keynesian economics were developed by Keynes in his book, The General Theory of Employment, Interest and Money, published in 1936. This work launched the modern study of macroeconomics and served as a guide for both macroeconomic theory and macroeconomic policies for four decades. Although it fell out of favor in the 1980s, Keynesian principles remain important to modern macroeconomic theories, especially aggregate market (AS-AD) analysis.
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BLUE PLACIDOLA
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Today, you are likely to spend a great deal of time at the confiscated property police auction looking to buy either decorative picture frames or storage boxes for your income tax returns. Be on the lookout for high interest rates.
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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.
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"Recipe for success. Study while others are sleeping; work while others are loafing, prepare while others are playing, and dream while others are wishing." -- William A. Ward
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AS
Aggregate Supply
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