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Answer»  Interdependence: - Under oligopoly the number of setters or producers is very few so they strive to gather information about other setters or producers. Setters compete on the basis of price or product, they decide price or variety based on the actions of their competitors. This is called interdependence In oligopoly market there are very few sellers and producers. So, the sellers or producers can easily gain important information about other sellers or producers.
 - The sellers and producers then pay special attention on the quality and type of the product to compete with other similar products and attract consumers. For example, producers and sellers of television, car, etc. follow similar practices of discount, features, etc.
 - The firms decide price, quality or type of its product, based on the behaviour of the competitors and so they are interdependent.
  
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