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TACIT COLLUSION: Seemingly independent, but parallel actions among competing firms (mostly oligopolistic firms) in an industry that achieve higher prices and profits, much as if guided by an explicit collusion agreement. Also termed implicit collusion, the distinguishing feature of tacit collusion is the lack of any explicit agreement. They key is that each firm seems to be acting independently, perhaps each responding to the same market conditions, but the end result is the same as an explicit agreement. This should be contrasted with explicit or overt collusion that does involve a formal, explicit agreement.
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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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GREEN LOGIGUIN [What's This?]
Today, you are likely to spend a great deal of time flipping through the yellow pages looking to buy either an AC adapter for your CD player or storage boxes for your family photos. Be on the lookout for small children selling products door-to-door. Your Complete Scope
This isn't me! What am I?
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General Electric is the only stock from the original 1896 Dow Jones Industrial Average remaining in the current index.
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"Failure is a part of success. There is no such thing as a bed of roses all your life. But failure will never stand in the way of success if you learn from it. " -- Hank Aaron, baseball player
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AS-AD Aggregate Supply-Aggregate Demand Model
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