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RIVAL CONSUMPTION: Consumption of a good by one person imposes a cost on, or prevents consumption of the good by, another person. Some goods, like food, have extremely rival consumption. One person, and only one person, gets the benefit. Other goods, like national defense, have no consumption rivalry, everyone can benefit simultaneously without imposing a cost on others. This is one of the two key characteristics of a good (the other is excludability) that distinguishes between common-property goods, near-public goods, private goods, and public goods.

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KEYNESIAN CROSS

A diagram illustrating the basic Keynesian theory of macroeconomics, with aggregate expenditures measured on the vertical axis and aggregate production measured on the horizontal axis, with the relation between aggregate expenditures and aggregate production represented by a positively-sloped aggregate expenditures line. The "cross" aspect of this diagram is the intersection between the aggregate expenditures line and a 45-degree line indicating every point of equality between aggregate expenditures and aggregate production. The "Keynesian" aspect of this diagram is derived from John Maynard Keynes, the developer and namesake of Keynesian economics.

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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time flipping through mail order catalogs seeking 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 vindictive digital clocks with revenge on their minds.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
"Rowing harder doesn't help if the boat is headed in the wrong direction. "

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