What is government intervention in economics A-Level?

Government intervention occurs when free markets fail to allocate resources efficiently or fairly. Governments use tools such as taxes, subsidies, price controls, and regulation to correct these failures. The justification for intervening is almost always rooted in some form of market failure.

In the UK, examples include the sugar levy introduced in 2018 to reduce consumption of sugary drinks, subsidies for renewable energy producers, and the National Living Wage as a form of price floor. Each policy targets a specific market failure, such as negative externalities or information gaps.

Not all intervention is beneficial — government failure can occur when intervention creates new inefficiencies or unintended consequences. For example, a price ceiling set below equilibrium can lead to excess demand and shortages, as seen in rent control debates in UK cities.

1. →(4 marks) Explain what is meant by a price floor and give one example from the UK economy.
2. →(8 marks) Explain two reasons why a government might choose to subsidise public transport.
3. →(12 marks) Analyse the impact of a tax on producers of fossil fuels on consumers and the environment.
4. →(20 marks) Evaluate the view that taxation is the most effective form of government intervention to correct negative externalities.
5. →(25 marks) "Government intervention in markets always leads to a more efficient allocation of resources." Evaluate this statement with reference to UK policy examples.

• →Always define the specific type of intervention mentioned in the question — confusing a subsidy with a price control is a common error that loses marks immediately.
• →Show the impact of intervention using a correctly labelled supply and demand diagram, including the shift, new equilibrium, and any welfare effects such as deadweight loss.
• →Avoid stating that government intervention is always justified — examiners reward balanced evaluation that acknowledges the risk of government failure.
• →Include a specific UK policy example in every extended answer, such as the sugar levy or the National Living Wage, to demonstrate applied knowledge.
• →Define market failure before explaining the intervention in longer answers — examiners expect you to establish why intervention is needed before assessing how effective it is.

Government Intervention: Actions taken by the state to influence the production, consumption, or pricing of goods and services in a market economy.

Market Failure: A situation in which the free market fails to allocate resources efficiently, resulting in a loss of economic and social welfare.

Indirect Tax: A tax levied on producers by the government, which raises the cost of production and is typically passed on to consumers through higher prices.

Subsidy: A payment made by the government to producers or consumers to lower costs, increase output, or encourage consumption of a good or service.

Price Floor: A minimum legal price set by the government above the equilibrium price, designed to ensure producers receive a sufficient income — for example, the National Living Wage.

Government Failure: A situation in which government intervention in a market creates new inefficiencies or unintended consequences, resulting in a worse allocation of resources than before.