Oligopoly, alludes to showcase structure where just modest number of firms work together control most of the portion of the overall industry. Firms are neither value takers or producers. Firms will quite often stay away from cost battle by following cost inflexibility. They intently screen the costs of their rivals and change costs appropriately. Oligopoly firms center around quality and proficiency of their items to rival different firms. Model: Network providers(5] ( Entry boundaries, Small number of venders, numerous purchasers, items can be homogeneous or separated). Three sorts of oligopoly