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TRADE UNION: A labor union composed of workers in the same occupation, but not necessarily in the same industry, producing the same product, or employed by the same firm. Common examples of craft unions are for plumbers, carpenters, and musicians. Craft unions generally exert market control by limiting the number of suppliers. The American Federation of Labor (AFL) began as a collection of craft unions. This is also termed a craft union.

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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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Today, you are likely to spend a great deal of time driving to a factory outlet hoping to buy either a T-shirt commemorating yesterday or a pair of handcrafted oven mitts. Be on the lookout for fairy dust that tastes like salt.
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John Maynard Keynes was born the same year Karl Marx died.
"The secret of getting things done is to act! "

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