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CLOSED SHOP: 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.

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MARGINAL REVENUE, MONOPOLY

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a monopoly receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a monopoly equates marginal revenue and marginal cost.

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Today, you are likely to spend a great deal of time searching for rummage sales trying to buy either storage boxes for your family photos or a large, stuffed giraffe. Be on the lookout for rusty deck screws.
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Junk bonds are so called because they have a better than 50% chance of default, carrying a Standard & Poor's rating of CC or lower.
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