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PERFECT COMPETITION, REALISM: Perfect competition is an idealized market structure that does NOT exist in the real world. While some real world industries might come relatively close to one or two of the four key characteristics of perfect competition, none matches all four sufficiently that they can be declared PERFECTLY competitively. Some industries come close on the large number of small firms and the identical product characteristics. A few industries have relatively good, although not perfect, information about prices and technology. However, almost all industries fall far short of the perfect mobility characteristics.
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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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PURPLE SMARPHIN
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Today, you are likely to spend a great deal of time strolling through a department store trying to buy either storage boxes for your income tax returns or an AC adapter for your CD player. Be on the lookout for deranged pelicans.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
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"I know the price of success; dedication, hard work and an unremitting devotion to the things you want to see happen. " -- Frank Lloyd Wright, architect
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