Causes & Consequences of Market Failure

Exam code: 2281

Written by: Ashika|Reviewed by: Caroline Carroll|Updated 2 July 2026

Market Failure occurs when free market activity results in a less than optimum allocation of resources from the point of view of society

These are goods that are over-consumed because individuals underestimate how harmful they are to themselves
- The focus is on the individual’s misjudgement of private harm
- These goods are often addictive
  - For example, gambling, alcohol, drugs, sugary foods and drinks

Consequences
Overuse leads to increased pressure on public healthcare and social services Rising social costs from crime, addiction, or long-term illness Lost economic productivity due to poor health or absenteeism

These are goods that are beneficial to society but consumers under-consume them as they do not fully recognise the private benefits
- Consumers make poor decisions due to lack of information or short-term thinking
  - For example. vaccinations, education, electric cars

Consequences
Lower public health or educational outcomes Slower economic growth due to underinvestment in human capital Widening inequality — especially for low-income households

Public goods are beneficial to society but would be underprovided by a free market
Public goods are goods that are:
- Non-excludable: you can't stop someone from using them
- Non-rivalrous: one person’s use doesn’t reduce availability for others
Due to the above two factors, there is little opportunity for sellers to make profits from providing these goods and services
- Examples include national defence, parks, libraries and lighthouses

Consequences
Little – or no – provision in a free market Reduced safety, infrastructure, or national welfare Public goods become dependent on taxation and government budgets

The development of monopoly markets is a natural outcome of a market system
Firms seek to eliminate competition by buying out competitors and increasing their ownership of factors of production
With less competition, firms can raise prices, reduce the choice available to consumers, or limit the supply

Consequences
Consumers pay more and get less value for money Some consumers are unable to benefit from the good or service Fewer choices (less competition) and lower-quality goods or services Resources are not used in the most efficient way for society

Externalities occur when there is an external cost or external benefit on a third party not involved in the economic transaction
- The price mechanism in a free market ignores these externalities
If these external costs/benefits were acknowledged, then the price and output in the market would be different

Consequences
Overproduction of goods with external costs (e.g. factory waste) Underproduction of goods with external benefits (e.g. vaccinations) Misallocation of resources, reducing social welfare

Many merit goods also create external benefits, so they are common causes of market failure. But they are not identical:

	Merit goods	External benefits (positive externalities)
Definition	Goods under-consumed because individuals undervalue their benefits	Benefits that are received by third parties not involved in the transaction
Cause of market failure	People make poor decisions due to lack of information or short-term thinking	The full benefit of a good is not reflected in the market price
Key issue	Under-consumption due to misjudged private benefit	Under-production or under-consumption due to unpriced social benefit
May include	Education, vaccinations, healthy food	Public transport, planting trees, community art
Do they always overlap?	Not always — not all merit goods have external benefits	Not always — not all external benefits come from merit goods

Many demerit goods also create external costs, so they are common causes of market failure. But they are not identical:

	Demerit goods	External costs (negative externalities)
Focus	Private harm underestimated by consumer	Harm to third parties (society)
Cause of market failure	Poor decision-making by individuals	Costs not reflected in the market price
May include	Cigarettes, alcohol, sugary drinks	Pollution from factories, traffic congestion, noise
Do they always overlap?	Not always	Not always

Causes of market failure