Spectrum of competition GapFill

A market structure dominated by a single buyer is called  monopolistic an oligopoly a monopolya monopsony . A  monopolyduopolymonopsony monopolistic set-up is a market structure dominated by one large seller. A   naturalpureregulardormant monopoly is a firm with such extreme   diseconomieseconomiesreturnsbarriers of scale that once it starts producing it can produce at a far cheaper cost than competitive markets. The act of charging different prices to different customers for the same product on reasons other than   pricescostsqualitytechnology is called price  bidding discrimination cutting monitoring . Monopolies continue to enjoy   losses abnormal profits subnormal profitsnormal profits even in the long run because of the existence of  barriers to entry price discrimination unique products an unregulated market .   FirstSeventhThirdSecond-degree price discrimination occurs when a firm charges different prices to different   rangesphasesnumbersgroups of customers.