Economic Definition of closed shop. Defined.
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Term closed shop Definition: An employment arrangement, usually written into a collective bargaining agreement, in which a firm is allowed to hire only labor union members. Because this gives a labor union complete control over the labor services supplied to a particular firm, it was one of the earliest methods used by labor unions to monopolized a labor market. However, closed shops were outlawed by the Taft-Hartley Act passed in 1947 and has been largely supplanted by union shops.