1.4 government intervention

merit goods

demerit goods

positive externality

negative externality

define minimum price and why it may be introduced in a market

• A minimum price is a price set by government, below which the price is not allowed to fall

• To be effective the minimum price needs to be set above the free market equilibrium price

 Examples include minimum wage laws or price floors for agricultural products.

outline the details of minimum price on alcohol which is in place in the uk

minimum price - 50p per unit of alcohol
this policy aims to reduce alcohol related harm such as crime,liver failure,NHS waiting lists it targets cheap and accessible alcohol

Supply and demand impact of a minimum price

minimum price purpose

• Generally used to raise the price of a good that creates a negative externality

  • The increase in price should push it nearer to reflecting the social costs – i.e. the total costs to society

protecting producers (farmers) and minimum wage

minimum price problems

4

• A minimum price creates a surplus and disequilibrium will need to be maintained

• Some producers would be happy to sell below the minimum price

  • Potential for a black market

• Poorer households are likely to be disproportionately affected

• Government may set price too low (e.g. alcohol minimum price in England and Wales) so that it has little or no impact

maximum price

• A maximum price is a price set by government, above which the price is not allowed to rise

• To be effective the maximum price needs to be set below the free market equilibrium price

why may maximum prices be introduced

• Could be used to lower the price of a good that creates a positive externality

  • The reduction in price should price consumers in to the market and increase the consumption

• A price cap could also be used to make necessities affordable (food, housing) or to prevent exploitation of consumers by powerful businesses

maximum prices examples

• Maximum price: car £54.85; motorbike £29.65

• Many garages offer MOTs significantly below the maximum price

• Train tickets

  • Some fare types are regulated by government

  • Train companies prevented from raising price too high

• Both have a positive externality element to them:

  • MOTs check a car is road-safe

  • Train use reduces congestion and emissions compared to car use

maximum prices diagram

problems by maximum price

3

• A maximum price will create a shortage and disequilibrium will need to be maintained

• Some consumers may be prepared to pay above the maximum price to get the goods that they want

  • Potential for a black market

• Normally with a shortage, the price rises and acts as a rationing device, so that the market clears

  • With a maximum price it loses its rationing ability, so a different form of rationing must be adopted (e.g. waiting lists)

maximum prices impact on producer surplus

maximum prices consumer surplus

• Consumer surplus

  • Consumer surplus increases as the price falls

  • However

    • As there is a shortage some consumers will not be able to consume the good and so will miss out (i.e. Q1 falls to QS)

summarise the aim of pollution permits

• An alternative way of reducing pollution in the production of goods

• They reduce pollution at a lower cost than a ‘command & control’ method

how pollution permits work

1. A fixed number of emission permits is allocated each year to polluting factories

2. Each permit entitles a firm to emit a set amount of pollution

3. Permits can be traded – i.e. “cap and trade”

4. Factories which can reduce pollution for less than the price of a permit can sell spare ones

5. Factories which find it more expensive to reduce pollution can buy extra permits instead

6. The number of permits can be reduced over time - the government can buy permits and remove them from the market

taxation of carbon emissions

• Taxation of carbon emissions is a viable alternative

  • Each unit of production that creates pollution is taxed, or each actual ton of carbon emitted is taxed

• It raises the price of the polluting activity

• Ideally the tax should be equal to the external cost - this would increase the MPC to the value of the MSC

  • “Internalising the externality”

pollution permits VS taxation

• Permits create a stronger financial incentive to cut pollution than taxes

• There is a clearer limit on pollution with pollution permits than with taxation

  • The total number of permits is the limit

  • Harder to predict the impact on emissions when imposing a tax

public good

avaliable to everyone and one persons use does not reduce its avaliability to others

-clean air

non-rival

one persons use does not reduce its avaliability to others

non excludable

no one can be prevented from using the good ,everyone can access

why are public goods provided by the state

as private companies typically do not have enough incentive to provide them they are non rival. businesses are unable to profit from them so the state steps in to ensure these goods are available for everyone to use ensuring society’s well-being

advantages and disadvantages of the state providing

unviersal access

equity

high tax

misallocation of resources

unintended consequences

• Policy interventions may lead to effects that are unanticipated

• Individuals in society can be unpredictable and may respond to policies in a way that is unexpected

• These unintended consequences could be either positive or negative

• Examples:

  • Smoking ban – increased use of outdoor patio heaters, leading to greater electricity consumption

  • 5p plastic bag charge – increased theft of baskets

carbon tax evaluation

• regressive impact: It can disproportionately affect low-income households, who spend more of their income on energy.

• Industry resistance: Some industries may oppose it, especially if they rely heavily on fossil fuels.

• Competitiveness: It might make domestic products more expensive than imports from countries without a carbon tax—unless border adjustments are applied.

contractionary fiscal policy

distortion of price signals leading to government failure

• Some government policies distort the prices that would otherwise be created by the market (e.g. taxes, subsidies, min/max pricing)

• Example:

  • Minimum wage – raises income levels but may mean businesses lay off the lowest paid which were the people the government had wanted to protect

government failure administrative costs

• Sometimes the bureaucracy involved in administering a policy may become very ‘bloated’ and costly

• If the costs of administering a policy are greater than the benefits to society of that policy then there is likely to be a misallocation of resources

information gaps market failure

indirect taxes

• Used to reduce production/consumption of negative externalities.

• Examples: Cigarettes (tobacco duty), petrol, alcohol, sugar tax.

• Diagram: Supply shifts left (or upward if specific tax).

Evaluation:

• Tax revenue generation (used for hypothecation?)

• Unintended consequences (e.g., black markets)

• Elasticity impacts effectiveness

• Equity: regressive impact on lower-income households

subsidies

• Used to increase production/consumption to internalise positive externalities.

• Examples: Public transport subsidies, renewable energy support.

• Diagram: Supply shifts right (or downward).

Evaluation:

• Opportunity cost to government

• Risk of government failure (misallocation)

• Dependency of firms

• Elasticity and effectiveness

state provision of merit goods

• Example: NHS, education

• Address under-consumption due to information failure

Evaluation:

• Government failure risk

• Overuse or inefficiency

• Equity vs. efficiency again

Tradable Pollution Permits (Link with Theme 4 for synoptic depth)

• Market-based approach to internalising external costs.

• Firms buy/sell pollution rights.

Evaluation:

• Hard to set correct cap

• Admin costs

• Risk of monopolisation of permits

real world examples

7

• Sugar Tax (UK) – indirect tax on soft drinks (2018)

• Plastic Bag Charge – reduction in plastic bag usage

• Minimum Alcohol Pricing – Scotland (2018)

• Congestion Charge (London) – externalities and road pricing

• Subsidies for Electric Cars/Green Energy

• COVID vaccine funding – state provision, public good

• Ofgem / Ofcom – regulators enforcing rules on utilities

evaluations for indirect taxation

• Time lags – effects take time to work,it might take time for consumers to change their behavior (due to addiction, habit, or lack of substitutes).

• Elasticity – determines responsiveness and effectiveness

• Unintended consequences – e.g., black markets, job losses

• Behavioral factors – people don’t always act rationally

• Consumers may act irrationally, continuing to consume them even when prices rise due to tax.

• This reduces the effectiveness of indirect taxes in changing behaviour.

indirect taxes

An indirect tax is a tax imposed on goods or services, which is paid by producers to the government but is often passed on to consumers through higher prices.

why may government intervene in markerts

• To correct market failure (e.g. externalities, missing markets)

• To promote equity or redistribute income

• To regulate monopolies

how can information provision correct market failure

Market failure can occur due to information gaps. The government can provide accurate information (e.g. health warnings on cigarettes), allowing consumers to make more informed choices, thus improving allocative efficiency.

subsidies effectiveness

Benefits:

• Reduces price, increases consumption of merit goods

• Internalises positive externalities

• Supports producers and innovation (e.g. renewables)

Drawbacks:

• Cost to government (opportunity cost)

• May cause overproduction or dependency

• Difficult to set correct amount

advantages on maximum price in housing market

Advantages:

• Increases affordability for low-income households

• Prevents exploitation during housing crises

• May reduce homelessness

Disadvantages:

• Creates excess demand (shortages)

• Disincentivises landlords from maintaining or supplying housing

• May lead to black markets or waiting lists