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ZERO-SUM GAME: A situation in which a fixed amount is divided up among the winners and losers. In a zero-sum game the wins equal the losses. Many stock market, or financial market, exchanges are zero-sum. One person buys low and sells high, while another buys high and sells low. The wealth in such transactions are merely transferred from one person to another. "Productive" market transactions, in contrast, are not zero-sum. The act of producing goods and services from resources that are consumed to satisfy wants and needs results in a net gain to society.
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FOUR-FIRM CONCENTRATION RATIO The proportion of total output in an industry produced by the four largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The four-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the four largest firms in the industry.
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GRAY SKITTERY
[What's This?]
Today, you are likely to spend a great deal of time searching for a specialty store hoping to buy either a birthday greeting card for your aunt or a wall poster commemorating the moon landing. Be on the lookout for jovial bank tellers.
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It's estimated that the U.S. economy has about $20 million of counterfeit currency in circulation, less than 0.001 perecent of the total legal currency.
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"Advice is like snow ‚ the softer it falls, the longer it dwells upon and the deeper it sinks into the mind. " -- Samuel Taylor Coleridge, poet
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AR(N)
A nth-order Autoregressive Process
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