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SECOND-DEGREE PRICE DISCRIMINATION: A form of price discrimination in which a seller charges the different prices for different quantities of a good. This also goes by the name block pricing. This is possible because the different quantities are purchased by different types of buyers with different demand elasticities. This is one of three price discrimination degrees. The others are first-degree price discrimination and third-degree price discrimination.

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EFFECTIVE DEMAND

A key conceptual notion of Keynesian economics stipulating that the aggregate expenditures on real production is based on existing or actual income rather than the income that would be generated with full employment of resources. Effective demand is embodied in the aggregate expenditures line, which has a positive slope, but a slope of less than one. This concept was proposed by Thomas Robert Malthus in the early 1800s as a counter argument to Say's law found in classical economics and then found new life when John Maynard Keynes developed his theory in the 1930s.

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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time searching for rummage sales looking to buy either a pleather CD case or a how-to book on fine dining. Be on the lookout for deranged pelicans.
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