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A full oligopoly is one in which a price leader is not present in the market, and where firms enjoy relatively similar market control. A partial oligopoly is one where a single firm dominates an industry through saturation of the market, producing a high percentage of total output and having large influence over market conditions.
A profitable collusion is possible, if the number of bidders is finite and the identity of the winner is publicly observable. It can be very difficult or even impossible for the seller to detect such collusion from the distribution of bids only. In case of spectrum auctions, some sources claim that a tacit collusion is easily upset: [17]
Collusion is a deceitful agreement or secret cooperation between two or more parties to limit open competition by deceiving, misleading or defrauding others of their legal right. Collusion is not always considered illegal. It can be used to attain objectives forbidden by law; for example
An oligopoly may engage in collusion, either tacit or overt to exercise market power and manipulate prices to control demand and revenue for a collection of firms. A group of firms that explicitly agree to affect market price or output is called a cartel , with the organization of petroleum-exporting countries ( OPEC ) being one of the most ...
If the price of a new supplier is lower than the usual corporate bidding price, the reason may be that there is a collusion of bidding among existing companies. If the price of a new supplier drops significantly after bidding, the reason may be that some suppliers have been colluding and the new supplier has forced them to compete. [35]
Examples are Cournot oligopoly, and Bertrand oligopoly for differentiated products. Bain's (1956) original concern with market concentration was based on an intuitive relationship between high concentration and collusion which led to Bain's finding that firms in concentrated markets should be earning supra-competitive profits.
An example would be the Aspen Skiing Co. v. Aspen Highlands Skiing Corp., 472 U.S. 585 (1985) where these two firms owning these mountains formed a joint venture to offer consumers a lift ticket good at all four areas. Although they were not engaging in price competition, this joint venture was structured in a way where non-price competition ...
In oligopoly theory, conjectural variation is the belief that one firm has an idea about the way its competitors may react if it varies its output or price. The firm forms a conjecture about the variation in the other firm's output that will accompany any change in its own output.