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OLIGOPOLISTIC BEHAVIOR: Oligopolistic industries are nothing if not diverse. Some sell identical products, others differentiated products. Some have three or four firms of nearly equal size, others have one large dominate firm (a clear industry leader) and a handful of smaller firms (that follow the leader). Whatever products they may sell, and however they may be organized, oligopolistic industries share several behavioral tendencies, including (1) interdependence, (2) rigid prices, (3) nonprice competition, (4) mergers, and (5) collusion. In other words, each oligopolistic firm keeps a close eye on the decisions made by other firms in the industry (interdependence), are reluctant to change prices (rigid prices), but instead try to attract the competitors customers using incentives other than prices (nonprice competition), and when they get tired of competing with their competitors they are inclined to cooperate either legally (mergers) or illegally (collusion).

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EXCESS DEMAND

A disequilibrium condition in a competitive market in which the quantity demanded is greater than the quantity supplied. Excess demand is another way to say shortage. It also goes by the common term of sellers' market. Excess demand is one of two disequilibrium states of the market. The other is excess supply (or surplus).

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Today, you are likely to spend a great deal of time at the confiscated property police auction wanting to buy either a box of multi-colored, plastic paper clips or several orange mixing bowls. Be on the lookout for telephone calls from long-lost relatives.
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