2.1.1

Types of Market Failure

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Market Failure

Market failure happens when the price mechanism fails to efficiently allocate the scarce resources to where they are best suited.

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Market failure

  • Market failure is when the price mechanism leads to a misallocation of resources.
  • Resources are misallocated when they are not devoted to the use that will give society the most welfare.
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Complete and partial market failure

  • Complete market failure happens where, unless the good or service is provided outside the mechanism, there wouldn't be a market for it.
    • E.g a country's military services.
  • Partial market failure happens when the private sector may partially provide it but at the wrong price or quantity.
    • E.g private healthcare vs NHS.

Why Market Failure Happens

Producing and consuming at the wrong price and quantity is bad for society because resources could be better used to improve welfare. Some goods affect third parties (not the producer or the consumer) when produced or consumed. The effects are called externalities.

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Private benefits

  • The benefits of a good can be separated into the private and external benefits.
  • The costs are also separated into private and external.
  • Private benefits are observed and accounted for by the market.
  • But, because of asymmetry of information, the external consequences of a good are often ignored.
  • So we see over/underconsumption/production of some goods in the free market.
  • This is a source of market failure.
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Social benefit

  • The social benefit is equal to the sum of the external and private benefits.
  • The socially optimal quantity is where it is allocatively efficient to produce and consume.
  • This is a different quantity to what is often observed in the free market.
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Private vs social benefits

  • The difference between the social benefit and the private benefit is the external benefit.
  • If the social and private curves are parallel, the external benefit is constant.
  • If they diverge, the external benefit becomes greater as output is increased.
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Causes of market failure

  • Market failure can arise from a number of causes:
    • Externalities.
    • A lack of public goods.
    • Information gaps.

Jump to other topics

1Introduction to Markets

2Market Failure

3The UK Macroeconomy

4The UK Economy - Policies

5Business Behaviour

6Market Structures

7A Global Perspective

8Finance & Inequality

9Examples of Global Policy

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