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  2. Perfect competition - Wikipedia

    en.wikipedia.org/wiki/Perfect_competition

    Perfect competition provides both allocative efficiency and productive efficiency: Such markets are allocatively efficient, as output will always occur where marginal cost is equal to average revenue i.e. price (MC = AR). In perfect competition, any profit-maximizing producer faces a market price equal to its marginal

  3. Market structure - Wikipedia

    en.wikipedia.org/wiki/Market_structure

    The correct sequence of the market structure from most to least competitive is perfect competition, imperfect competition, oligopoly, and pure monopoly. The main criteria by which one can distinguish between different market structures are: the number and size of firms and consumers in the market, the type of goods and services being traded ...

  4. Abnormal profit - Wikipedia

    en.wikipedia.org/wiki/Abnormal_profit

    Abnormal profit is usually generated by an oligopoly or a monopoly; however, firms often try to hide this fact, both from the market and government, in order to reduce the chance of competition, or government intervention in the form of an antitrust investigation. [citation needed] In principle, there are three kinds of abnormal profit ...

  5. Market power - Wikipedia

    en.wikipedia.org/wiki/Market_power

    There are four main forms of market structures that are observed: perfect competition, monopolistic competition, oligopoly, and monopoly. [11] Perfect competition and monopoly represent the two extremes of market structure, respectively. Monopolistic competition and oligopoly exist in between these two extremes. [10]

  6. Imperfect competition - Wikipedia

    en.wikipedia.org/wiki/Imperfect_competition

    The imperfect theorists' perspective argues that policy based on assumptions of perfect competition is not effective as no market exists in purely perfectly competitive conditions. The argument for assuming perfect competition in economic decision making prevails on the widespread use of its logic, and the present lack of substantial and ...

  7. Competition (economics) - Wikipedia

    en.wikipedia.org/wiki/Competition_(economics)

    Monopoly is the opposite to perfect competition. Where perfect competition is defined by many small firms competition for market share in the economy, Monopolies are where one firm holds the entire market share. Instead of industry or market defining the firms, monopolies are the single firm that defines and dictates the entire market. [10]

  8. Fundamental theorems of welfare economics - Wikipedia

    en.wikipedia.org/wiki/Fundamental_theorems_of...

    For phenomena of type I [i.e. perfect competition], when equilibrium takes place at a point of tangency of indifference curves, the members of the collectivity enjoy a maximum of ophelimity. He adds that 'a rigorous proof cannot be given without the help of mathematics' and refers to his Appendix. [14]

  9. Product differentiation - Wikipedia

    en.wikipedia.org/wiki/Product_differentiation

    This competition is a two factor game: one is of offering of remote access and the other is of deposit rates. Hypothetically, there will be two consequential scenarios if only one bank offers remote access. First, the bank gains a positive market share for all types of remote access, giving rise to horizontal dominance.