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UNION SHOP: An employment arrangement, usually written into a collective bargaining agreement, in which a firm is free to hire both union and nonunion employees, with the stipulation that workers must join the union once hired. Union shops became a popular method of gaining control over the labor services when closed shops were outlawed by the Taft-Hartley Act passed in 1947. Those states with right-to-work laws effectively outlaw union shops. The alternative to a union shop is an open shop.

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SCREENING

When confronted by asymmetric information, the use of small bits of information, or indicators, that suggest more comprehensive information. Screening occurs when those with limited information try to identify indicators suggesting more complete information. It is used in markets with adverse selection and moral hazard, especially in labor markets and in the provision of insurance. Common methods of screening include aptitude tests, affiliations, past behavior, and personal characteristics. A related method is signalling.

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Today, you are likely to spend a great deal of time at a flea market wanting to buy either a half-dozen helium filled balloons or a packet of address labels large enough for addresses of both the sender and the recipient. Be on the lookout for celebrities who speak directly to you through your television.
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The Dow Jones family of stock market price indexes began with a simple average of 11 stock prices in 1884.
"Chance favors only the prepared mind."

-- Louis Pasteur, biologist

JPUBE
Journal of Public Economics
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