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  2. Market failure - Wikipedia

    en.wikipedia.org/wiki/Market_failure

    Different economists have different views about what events are the sources of market failure. Mainstream economic analysis widely accepts that a market failure (relative to Pareto efficiency) can occur for three main reasons: if the market is "monopolised" or a small group of businesses hold significant market power, if production of the good or service results in an externality (external ...

  3. Complete market - Wikipedia

    en.wikipedia.org/wiki/Complete_market

    In economics, a complete market (aka Arrow-Debreu market [1] or complete system of markets) is a market with two conditions: Negligible transaction costs [1] and therefore also perfect information, Every asset in every possible state of the world has a price. [2]

  4. Market (economics) - Wikipedia

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

    Used cars market: due to presence of fundamental asymmetrical information between seller and buyer the market equilibrium is not efficient—in the language of economists it is a market failure. Around the 1970s the study of market failures came into focus with the study of information asymmetry. In particular, three authors emerged from this ...

  5. Information asymmetry - Wikipedia

    en.wikipedia.org/wiki/Information_asymmetry

    Information asymmetry occurs in situations where some parties have more information regarding an issue than others. It is considered a major cause of market failure. [56] The contribution of information asymmetry to market failure arises from the fact that it impairs with the free hand which is expected to guide how modern markets work.

  6. Monopsony - Wikipedia

    en.wikipedia.org/wiki/Monopsony

    The market failure can only be addressed in one of two ways: either by breaking up the monopsony through anti-trust intervention, or by regulating the wage policy of firms. The most common kind of regulation is a binding minimum wage higher than the monopsonistic wage.

  7. Fundamental theorem of asset pricing - Wikipedia

    en.wikipedia.org/wiki/Fundamental_theorem_of...

    Though arbitrage opportunities do exist briefly in real life, it has been said that any sensible market model must avoid this type of profit. [2]: 5 The first theorem is important in that it ensures a fundamental property of market models. Completeness is a common property of market models (for instance the Black–Scholes model).

  8. Imperfect competition - Wikipedia

    en.wikipedia.org/wiki/Imperfect_competition

    Therefore, the level of market power under monopolistic competition is contingent on the degree of product differentiation. Monopolistic competition indicates that enterprises will participate in non-price competition. Monopolistic competition is defined to describe two main characteristics of a market: 1. There are many sellers in the market.

  9. Theory of the second best - Wikipedia

    en.wikipedia.org/wiki/Theory_of_the_second_best

    In welfare economics, the theory of the second best concerns the situation when one or more optimality conditions cannot be satisfied. [1] The economists Richard Lipsey and Kelvin Lancaster showed in 1956 that if one optimality condition in an economic model cannot be satisfied, it is possible that the next-best solution involves changing other variables away from the values that would ...