Solution:Oligopoly: Oligopoly is a market condition in which there are few (between 2 and 10) firms producing or selling a commodity. The shortest form of oligopoly is a duopoly, in which there are only two producers or sellers of a commodity.Features In on oligopoly, firms are dependent on each other.
• Oligopoly theory is the theory of group behavior.
• The demand curve of an oligopoly is uncertain.
• Entry and exit of firms are difficult.
• Throat cut competition' is found.
Monopoly: The literal meaning of monopoly is a single seller, that is, a situation in which a single seller or producer has a monopoly or control over the supply or production of a commodity. This is the opposite of perfect competition. In this market system there is production or supply of a commodity which has no immediate substitute. Therefore the demand curve is inelastic. Firms are prohibited from entering.
Properties
• There is only one producer or seller.
• The seller has complete control over the supply. The product produced does not have a close substitute.
• Ban on entry of other firms.
• There is no difference between firm and industry.
• Price discrimination is possible.