when they do occur the monopoly that sets the price and supply of a good or service is called the price maker due to a lack of competition in the market and high barriers to entry the company can inflate prices going further the monopoly can find the level of output that maximizes its profit by determining the point at which its marginal revenue exceeds its marginal cost 
with generally only one seller controlling the production and distribution of a good or service other firms cannot enter the market potential entrants to the market are at a disadvantage because the monopoly has the first mover advantage and can lower prices to undercut a potential newcomer and prevent them from gaining market share since there is only one supplier and firms cannot easily enter or exit there are no substitutes for the goods or services therefore a monopoly also has absolute product differentiation because there are no other comparable goods or services the history of monopoliesthe term monopoly originated in english law to describe a royal grant such a grant authorized one merchant or company to trade in a particular good while no other merchant or company could do so historically monopolistic markets arose when single producers received exclusive legal privileges from the government such as the arrangement reached between the federal communications commission fcc and at t between 1913 and 1984 during this period no other telecommunications company was allowed to compete with at t because the government erroneously believed the market could only support one producer more recently short run private companies may engage in monopoly like behavior when production has relatively high fixed costs which causes long run average total costs to decrease as output increases the effect of this behavior could temporarily allow a single producer to operate on a lower cost curve than any other producer effects of monopolistic marketsthe typical political and cultural objection to monopolistic markets is that a monopoly in the absence of other suppliers of the same product or service could charge a premium to their customers consumers have no substitutes and are forced to pay the price for the goods dictated by the monopolist in many respects this is an objection against high prices not necessarily monopolistic behavior the standard economic argument against monopolies is different according to neoclassical analysis a monopolistic market is undesirable because it restricts output not because of monopolist benefits by raising prices restricted output equates to less production which reduces total real social income even if monopolistic powers exist such as the u s postal service s legal monopoly on delivering first class mail consumers often have many alternatives such as using standard mail through fedex or ups or email for this reason it is uncommon for monopolistic markets to successfully restrict output or enjoy super normal profits in the long run regulation of a monopolistic marketas with the model of perfect competition the model for a monopolistic competition is difficult or impossible to replicate in the real economy true monopolies are typically the product of regulations against the competition it is common for instance for cities or towns to grant local monopolies to utility and telecommunications companies nevertheless governments often regulate private business behavior that appears monopolistic such as a situation where one firm owns the lion s share of a market the fcc world trade organization and the european union each have rules for managing monopolistic markets these are often called antitrust laws in march 2024 the justice department sued apple for monopolizing smartphone markets 