Explain the forms of market failure (public goods, externalities, asymmetric information, market power) and analyse the rationale for and forms of government intervention to correct market failure

What this dot point is asking

QCAA wants you to define market failure, identify the four major forms, draw the externality diagram, and analyse the forms of government intervention with Australian examples. Expect short and extended response in the EA.

The answer

Market failure defined

Market failure occurs when the competitive market fails to allocate resources efficiently. The market outcome differs from the socially optimal outcome.

Four forms

1. Public goods.

Two characteristics:

• Non-rival. One person's consumption does not reduce another's.
• Non-excludable. Cannot prevent non-payers from consuming.

Markets under-supply public goods because non-payers free-ride. Government provides them, funded by tax.

Australian examples. Defence, public broadcasting (ABC, SBS), lighthouses, BOM weather services, ARC-funded basic research.

2. Externalities.

Costs or benefits that fall on third parties not involved in the transaction.

• Negative externalities (external costs): pollution, traffic congestion, smoking. Private cost less than social cost; the market over-produces.
• Positive externalities (external benefits): vaccination, education, R&D. Private benefit less than social benefit; the market under-produces.

Diagram for negative externality. Demand and private supply, with social marginal cost above private marginal cost. Market equilibrium produces more than the socially optimal level. Deadweight loss = the triangle between the SMC and PMC curves over the over-production.

Australian examples.

• Negative: greenhouse gas emissions, alcohol-related harm, traffic congestion.
• Positive: vaccination (herd immunity), university research, energy efficiency upgrades.

3. Asymmetric information.

One party has more or better information than the other.

• Adverse selection (pre-contract): used car buyers cannot verify quality; high-risk applicants disproportionately seek insurance.
• Moral hazard (post-contract): insurance changes risk-taking behaviour; lenders cannot monitor how borrowers use funds.

Australian examples. ASIC regulation of financial product disclosure. APRA prudential standards. Consumer protection laws against misleading conduct.

4. Market power.

When few firms can raise prices above the competitive level.

• Monopoly: single firm.
• Oligopoly: few firms. The two major supermarkets (Coles, Woolworths) hold around 65 percent of grocery sales. The four major banks hold around 75 percent of mortgages.
• Monopolistic competition: many firms with differentiated products and some market power.

Market power produces higher prices, lower output, deadweight loss and possible quality and innovation losses.

Forms of government intervention

Five major tools:

1. Indirect taxes.

A tax on a good with a negative externality. The tax raises the price to consumers, reducing consumption toward the socially optimal level (Pigouvian taxation).

• Tobacco excise. Around $1.25 per cigarette in 2024-25. Reduces smoking and raises revenue (around$13 billion per year).
• Fuel excise. $0.50 per litre. Originally partly justified on emissions and road use externality grounds; mostly a general revenue measure now.
• Carbon pricing. Australia had an explicit carbon price 2012-14 (abolished). The 2023 reformed Safeguard Mechanism applies a cap-and-trade to the 215 largest emitters.

2. Subsidies.

A payment to encourage production or consumption of a good with positive externalities.

• Vaccination. Free or heavily subsidised under the National Immunisation Program.
• Education. Commonwealth Supported Places at universities, free TAFE.
• R&D Tax Incentive. Refundable tax offsets to incentivise private R&D.
• Renewables. Capacity Investment Scheme, Renewable Energy Target.

3. Regulation.

Direct rules constraining behaviour.

• ACCC enforcement of the Competition and Consumer Act 2010 (cartels, anti-competitive mergers, consumer protection).
• APRA prudential standards (capital adequacy, governance for banks and insurers).
• ASIC market conduct (financial advice, product disclosure).
• Environmental regulation under the EPBC Act 1999 and state legislation.
• Health and safety regulation (Therapeutic Goods Administration; Food Standards Australia and New Zealand).

4. Public provision.

Government provides the good itself.

• Medicare (universal health insurance).
• Public schools and TAFE.
• Public hospitals.
• Public broadcasting (ABC, SBS).
• Defence and law enforcement.

5. Direct provision via state-owned enterprises.

Government owns commercial businesses.

• Australia Post (mail and parcels).
• NBN Co (broadband wholesale).
• Snowy Hydro (renewable generation and storage).
• State utilities (Sydney Water, Yarra Valley Water).

Costs of intervention

Government intervention is justified only when the cost of intervention is less than the cost of market failure. Costs include:

1. Compliance cost for firms and consumers.
2. Administration cost for government agencies.
3. Allocative distortion from taxes and subsidies.
4. Government failure (regulatory capture, slow decisions, politicisation).
5. Unintended consequences (rent control reduces rental supply; first-home buyer grants raise house prices).

Recent Australian intervention examples

Safeguard Mechanism reform (2023)

Caps emissions from Australia's 215 largest industrial emitters, tightening 4.9 percent per year toward 2030.

Future Made in Australia (2024)

$22.7 billion industrial policy package for green metals, hydrogen, batteries, critical minerals.

Supermarket sector reforms (2024-25)

Following the ACCC inquiry, mandatory unit pricing, stronger Food and Grocery Code.

NDIS reform

Demand-side reform of disability services; ongoing scope and cost adjustments.

Free TAFE (2024-25)

300,000 free places under the National Skills Agreement, addressing the positive externality of skills training.

When government should intervene

Intervention is most justified when:

• Market failure is significant and persistent.
• Intervention has clearly identified mechanisms (taxes, subsidies, regulation, provision).
• Government has the information and capacity to design effective policy.
• The cost of intervention is less than the benefit.

Intervention is less justified when:

• Market imperfections are minor or self-correcting.
• Government cannot identify the right instrument.
• Distributional concerns can be addressed through redistribution rather than market distortion.

Common QCE traps

Conflating "public good" with "good provided by the public sector". A public good is technically non-rival and non-excludable. Many things provided by government (school education, healthcare) are not technically public goods, although they may have positive externalities.

Forgetting to draw the externality diagram

Markers reward responses that show the social marginal cost curve above the private marginal cost curve, with the deadweight loss triangle labelled.

Treating intervention as costless

Government failure is a real risk. Markers reward balanced analysis.

Quoting only the four big banks for market power

Use both supermarkets and banking for breadth.