How to Answer A-Level Economics Essay Questions: A Step-by-Step Guide

October 22, 2026

Market Failure in A-Level Economics: Complete H1 & H2 Guide

Market failure is one of the most important topics in A-Level Economics.

Students need to understand more than the definition.

They should be able to explain:

why markets may allocate resources inefficiently;
the difference between private and social costs and benefits;
positive and negative externalities;
public goods;
information failure;
merit and demerit goods;
government intervention;
limitations of government policies; and
whether intervention actually improves resource allocation.

Market failure questions can appear in both theoretical and real-world contexts, making this an important topic for JC Economics students to master.

This guide explains the key ideas step by step.

What Is Market Failure?

Market failure occurs when the free market fails to allocate resources efficiently.

In an ideal market outcome, resources would be allocated such that society’s welfare is maximised.

However, individual consumers and producers generally make decisions based on the private costs and private benefits that they face.

They may not fully account for costs or benefits imposed on other people.

There may also be:

missing markets;
imperfect information;
non-excludability;
non-rivalry; or
other reasons why private market decisions do not produce a socially efficient outcome.

This creates a potential rationale for government intervention.

What Is Allocative Efficiency?

Allocative efficiency occurs when resources are allocated towards the combination of goods and services that maximises society’s welfare.

In market-failure analysis, students frequently encounter the condition:

MSB = MSC

where:

MSB = Marginal Social Benefit

and

MSC = Marginal Social Cost.

The socially efficient quantity occurs where the marginal benefit to society from consuming an additional unit equals the marginal cost to society of producing that unit.

Private vs Social Costs and Benefits

Before learning externalities, students must understand four important concepts.

Marginal Private Cost — MPC

The additional cost incurred by the producer or decision-maker from producing one more unit.

Marginal External Cost — MEC

The additional cost imposed on third parties who are not directly involved in the transaction.

Marginal Social Cost — MSC

The total additional cost to society.

Conceptually:

MSC = MPC + MEC

Similarly:

Marginal Private Benefit — MPB

The additional benefit received by the consumer or decision-maker.

Marginal External Benefit — MEB

The additional benefit received by third parties.

Marginal Social Benefit — MSB

The total additional benefit to society.

Conceptually:

MSB = MPB + MEB

Understanding these relationships is essential for externality diagrams.

What Is an Externality?

An externality occurs when the production or consumption of a good creates a cost or benefit for a third party that is not fully reflected in the market transaction.

Externalities may be:

Negative

Positive.

They may also arise from:

Production

Consumption.

This gives students four broad possibilities:

Negative production externalities
Negative consumption externalities
Positive production externalities
Positive consumption externalities

Negative Externality of Production

A negative production externality occurs when producing a good imposes external costs on third parties.

A classic example is pollution.

Suppose a factory produces goods but releases pollution.

The firm considers costs such as:

labour;
electricity;
raw materials;
machinery; and
rent.

But people living nearby may experience:

poorer air quality;
noise;
health effects; or
environmental damage.

If the firm does not bear the full monetary cost of these effects, its private cost is lower than the total cost to society.

Therefore:

MSC > MPC

Why Does a Negative Production Externality Cause Overproduction?

The free-market producer makes decisions based primarily on private costs.

As a result, the market equilibrium quantity can exceed the socially efficient quantity.

In simple terms:

Market quantity > Socially efficient quantity

Too many resources are allocated to producing the good from society’s perspective.

This is overproduction.

The units produced beyond the socially efficient level create a welfare loss because their marginal social cost exceeds their marginal social benefit.

Singapore Example: Carbon Emissions

Carbon emissions provide a useful real-world context.

Production and energy use can generate greenhouse-gas emissions.

Individual firms may take account of their direct production costs but, without intervention, may not bear the full wider social cost associated with emissions.

This provides an economic rationale for policies that attempt to make decision-makers take greater account of these external costs.

For an examination answer, students should not merely state:

“Carbon emissions cause market failure.”

Explain the chain.

Example of a Stronger Analytical Chain

Production generates emissions.

These emissions can impose costs beyond the producer and consumer directly involved in the transaction.

If these external costs are not fully reflected in the firm’s private costs, MSC exceeds MPC.

The market therefore has an incentive to produce beyond the socially efficient quantity.

This results in allocative inefficiency and welfare loss.

That is the Economics.

Negative Externality of Consumption

Negative externalities can also arise from consumption.

Examples may include certain behaviours that impose costs on people other than the consumer.

The important point is that the individual considers private benefits and costs but may not fully account for effects on third parties.

Depending on the analytical framework used, the social benefit associated with consumption may therefore be lower than the private benefit.

This can lead to overconsumption relative to the socially efficient quantity.

Positive Externality

A positive externality occurs when production or consumption creates benefits for third parties.

These benefits are not fully captured by the person making the decision.

This can result in the market producing or consuming too little of the good.

Positive Externality of Consumption

Education is frequently used to illustrate positive consumption externalities.

The student receives private benefits such as:

knowledge;
skills;
qualifications; and
potentially improved employment opportunities.

But education may also generate wider benefits.

For example, a more educated workforce may contribute to:

productivity;
innovation;
civic participation; and
wider economic development.

When external benefits exist:

MSB > MPB

If consumers make decisions based primarily on their private benefits, consumption may be below the socially efficient quantity.

Why Does a Positive Externality Cause Underconsumption?

Consumers consider the benefit they personally receive.

But they do not necessarily take the external benefits to society into account.

The market quantity can therefore be lower than the socially efficient quantity.

In simple terms:

Market quantity < Socially efficient quantity

The good is underconsumed.

This produces allocative inefficiency.

Singapore Example: Education

Education is particularly useful for Singapore Economics students because it allows discussion of:

subsidies;
government provision;
human capital;
productivity;
equity; and
long-run economic growth.

However, do not merely list government programmes.

Always connect the example to economic theory.

What Are Merit Goods?

A merit good is generally considered to be a good that would be underconsumed in a free market.

This may arise because consumers:

underestimate private benefits;
lack information;
focus excessively on short-term considerations; or
fail to account for wider external benefits.

Education and healthcare are commonly discussed in this context.

Why Might Healthcare Be Underconsumed?

Suppose individuals underestimate the benefits of preventive healthcare.

They may focus on:

immediate cost;
inconvenience; or
current health

while underestimating future benefits.

This can contribute to underconsumption.

Healthcare may also generate external benefits in some contexts.

Students should distinguish carefully between:

information failure

and

positive externalities.

They are not exactly the same problem.

What Are Demerit Goods?

Demerit goods are goods that may be overconsumed because individuals underestimate their private costs or wider consequences.

Possible examples include:

cigarettes;
excessive alcohol consumption; and
other products associated with significant health or social costs.

Again, students should identify the precise source of market failure.

Is it:

negative externality?

imperfect information?

both?

Precision matters.

Information Failure

Markets work more effectively when economic agents have sufficient information to make informed decisions.

But information may be:

incomplete;
inaccurate;
difficult to understand;
costly to obtain; or
unevenly distributed.

Consumers may therefore make decisions that do not maximise their own welfare.

Example: Health Information

Suppose consumers underestimate the long-term health consequences of consuming a particular product.

Their perceived private benefit or perceived private cost may differ from the actual private benefit or cost.

Consumption decisions may therefore be distorted.

Government intervention might attempt to improve information through:

labelling;
public education;
disclosure requirements; or
advertising restrictions.

What Is Asymmetric Information?

Asymmetric information occurs when one party in a transaction possesses more or better information than another.

This can affect market outcomes because one side cannot accurately assess:

quality;
risk;
behaviour; or
relevant characteristics.

Two important concepts associated with asymmetric information are:

Adverse Selection

and

Moral Hazard.

What Is Adverse Selection?

Adverse selection arises when information asymmetry exists before a transaction and can result in an undesirable selection of market participants or products.

Insurance provides a common example.

Individuals may know more about their own risk characteristics than the insurer.

If insurers cannot distinguish accurately between different risk types, pricing and participation in the market may be affected.

The important idea is:

Hidden information before the transaction.

What Is Moral Hazard?

Moral hazard generally arises when behaviour changes after a transaction because one party does not bear the full consequences of its actions and the other party cannot perfectly observe or control that behaviour.

Again, insurance can provide a useful context.

After obtaining insurance, an individual may have less incentive to avoid certain risks if part of the financial consequence is borne by the insurer.

The key idea is:

Hidden action or changed incentives after the transaction.

Adverse Selection vs Moral Hazard

Students frequently confuse the two.

Remember:

Adverse Selection

Before the transaction.

Problem of hidden information or characteristics.

Moral Hazard

After the transaction.

Problem of hidden action or changed behaviour.

This distinction is extremely useful in examination answers.

What Are Public Goods?

A pure public good has two important characteristics:

Non-rivalry

One person’s consumption does not significantly reduce the amount available for another person.

Non-excludability

It is difficult or impossible to prevent non-payers from benefiting.

These characteristics create difficulties for private-market provision.

What Is the Free-Rider Problem?

If individuals cannot easily be excluded from benefiting, they have an incentive not to pay voluntarily.

They may think:

“Why should I pay if I can benefit anyway?”

If many people behave this way, private firms may struggle to collect sufficient revenue.

The market may therefore fail to provide the good, or provide an insufficient quantity.

This is known as the free-rider problem.

Examples of Public Goods

Common textbook examples include:

national defence;
certain forms of flood protection; and
street lighting in appropriate contexts.

Students should be careful.

Not every government-provided good is a public good.

Government-Provided Good Does Not Mean Public Good

This is a common examination mistake.

Education may be provided or heavily supported by government.

That does not automatically make education a pure public good.

Healthcare may receive government subsidies.

That does not automatically make healthcare a pure public good.

Public goods are identified by:

non-rivalry

and

non-excludability,

not by whether the government pays for them.

Why Does Market Failure Justify Government Intervention?

If the free market produces an inefficient allocation of resources, government intervention may potentially improve the outcome.

Possible interventions include:

indirect taxes;
subsidies;
regulation;
direct provision;
information campaigns;
tradable permits;
standards; and
other targeted policies.

However:

Market failure does not automatically mean government intervention will succeed.

This is where evaluation becomes important.

Policy 1: Indirect Taxation

A government may impose an indirect tax on activities associated with external costs.

The tax increases firms’ private costs.

If designed appropriately, it may encourage producers and/or consumers to take greater account of the external cost.

The objective is to reduce the quantity towards the socially efficient level.

How Does a Tax Correct a Negative Externality?

A simplified analytical chain is:

Tax imposed

→ private cost increases

→ supply decreases / market price increases

→ quantity traded decreases

→ activity generating the external cost decreases

→ market outcome moves closer to socially efficient quantity.

Students should explain the mechanism rather than simply saying:

“Tax reduces market failure.”

Advantage of an Indirect Tax

A tax changes incentives through the price mechanism.

Economic agents retain freedom to decide whether to:

consume;
produce;
reduce activity;
adopt alternatives; or
change technology.

The government may also collect revenue.

Limitation of an Indirect Tax

The government may not know the exact monetary value of the marginal external cost.

If the tax is too low, the externality may remain significant.

If the tax is too high, activity could be reduced beyond the socially efficient level.

This is an example of an information problem facing the government.

Evaluation: Price Elasticity of Demand

Suppose the objective is to reduce consumption.

If demand is relatively price inelastic, an increase in price caused by taxation may result in only a relatively small decrease in quantity demanded.

Therefore, taxation may be less effective at reducing consumption substantially.

However, it may still generate significant tax revenue.

Students should connect elasticity to the policy objective.

Policy 2: Subsidies

Subsidies may be used when a good generates external benefits or is underconsumed.

A subsidy reduces the effective cost of production or consumption.

This can encourage greater market activity.

How Can a Subsidy Address Underconsumption?

A simplified chain is:

Subsidy

→ cost faced by producer or consumer falls

→ market price may fall

→ quantity demanded and supplied increases

→ consumption moves closer towards the socially efficient level.

Again, students should connect the policy directly to the source of market failure.

Limitation of Subsidies

Subsidies have an opportunity cost.

Government funds used for one programme cannot simultaneously be spent elsewhere.

This is particularly important when government budgets face competing demands such as:

healthcare;
education;
infrastructure;
social support; and
security.

But do not merely state:

“There is an opportunity cost.”

Explain why it matters.

Policy 3: Regulation

Governments can regulate behaviour directly.

Examples might include:

emission limits;
safety requirements;
age restrictions;
product standards; or
restrictions on certain activities.

Regulation can be particularly useful when the government wants to establish a minimum standard or prohibit specific behaviour.

Advantages of Regulation

Regulation may provide:

clear rules;
predictable standards; and
direct limits on harmful activity.

It may be useful where relying solely on price incentives is insufficient.

Limitations of Regulation

Regulation requires:

monitoring;
enforcement;
administrative resources; and
sufficiently accurate information.

Firms or consumers may also attempt to avoid or circumvent the rules.

Compliance costs may arise.

The effectiveness therefore depends on implementation.

Policy 4: Education and Information

When market failure arises from imperfect information, improving information can address the problem more directly.

Policies may include:

public campaigns;
nutritional labels;
health warnings;
disclosure requirements; and
consumer education.

The objective is to enable individuals to make better-informed decisions.

Advantage of Information Provision

Unlike a ban, information provision can preserve consumer choice.

Individuals receive additional information and decide how to respond.

This may be appropriate when the primary problem is ignorance or misunderstanding.

Limitation of Information Provision

Providing information does not guarantee behavioural change.

Consumers may:

ignore the information;
discount future consequences;
have established habits; or
understand the risks but choose the activity anyway.

Therefore, information campaigns may need to complement other policies.

Policy 5: Direct Government Provision

Governments may directly provide or finance certain goods and services.

This can be relevant where the private market would otherwise provide insufficient access or where broader social objectives are involved.

Education and healthcare provide useful contexts for discussion.

Limitations of Direct Provision

Government provision is not costless.

Potential issues include:

opportunity cost;
administrative inefficiency;
difficulty determining the optimal quantity;
excess demand if services are heavily subsidised; and
pressure on public finances.

Students should evaluate rather than assume government provision is automatically efficient.

Policy 6: Tradable Permits

Tradable permits can be used to control activities such as pollution.

The government establishes an overall limit and issues permits allowing a specified amount of activity.

Firms can trade these permits.

This creates a market incentive to reduce pollution where doing so is relatively less costly.

Potential Advantage of Tradable Permits

Firms with relatively low abatement costs may reduce pollution and sell unused permits.

Firms with higher abatement costs may purchase permits.

This can help achieve an environmental target while allowing flexibility in how reductions occur.

Limitations of Tradable Permits

Effectiveness depends on factors such as:

the total number of permits;
monitoring;
enforcement;
market design; and
the government’s information about an appropriate emissions cap.

Poor design can reduce effectiveness.

What Is Government Failure?

Government intervention is intended to correct market failure.

But intervention itself can create inefficient outcomes.

This is often described as government failure.

Potential causes include:

imperfect information;
administrative costs;
unintended consequences;
regulatory capture;
poor policy design;
enforcement difficulties; and
political or institutional constraints.

Market Failure Does Not Automatically Mean “Government Must Intervene”

This is an important evaluation point.

Students should compare:

Cost of market failure

with

Cost and effectiveness of intervention.

If the market failure is small but intervention is extremely costly or poorly targeted, intervention may not improve welfare substantially.

The correct Economics question is not:

“Is the market perfect?”

It is:

“Can intervention produce a better outcome than the existing market outcome?”

How to Evaluate Government Intervention

Students can use several dimensions.

1. Magnitude

How serious is the market failure?

2. Elasticity

How responsive are consumers and producers?

3. Information

Does the government know the size of the externality or information problem?

4. Time

How quickly will the policy work?

5. Cost

What is the administrative or fiscal cost?

6. Equity

Who gains and who loses?

7. Unintended Consequences

Could the intervention create another problem?

8. Alternatives

Would another policy be more effective?

9. Policy Combination

Would several policies work better together?

These considerations create much stronger evaluation than memorised phrases.

Why Policy Combinations May Be More Effective

Market failures often have multiple causes.

Consider smoking.

Possible issues may include:

health information;
addiction;
external costs;
behavioural factors.

A single policy may therefore be insufficient.

Governments might combine:

taxation;
age restrictions;
information;
advertising restrictions; and
regulation.

Students can evaluate whether complementary policies address different dimensions of the problem.

Singapore Example: Road Congestion

Road congestion provides an excellent Economics application.

When an additional motorist enters a congested road, the journey may increase travel time for other road users.

The motorist considers private costs such as:

fuel;
vehicle expenses; and
personal travel time.

But may not fully account for the additional delay imposed on others.

This creates an external cost.

Road pricing can attempt to make motorists face more of the social cost associated with travelling at congested times or locations.

How to Analyse Road Pricing

A strong answer might proceed:

Congestion creates a negative externality because an additional road user imposes additional travel-time costs on other motorists.

Since the individual driver does not fully bear this external cost, the private cost of driving is below the social cost.

Road usage may therefore exceed the socially efficient level.

Road pricing raises the private cost faced by motorists and can reduce road usage towards a more efficient level.

How to Evaluate Road Pricing

Possible considerations include:

PED for road use;
availability of public transport;
necessity of travel;
time of day;
location;
income effects;
size of the charge; and
availability of alternative routes.

For example, demand may be less responsive when commuters have few practical substitutes.

That directly affects policy effectiveness.

Singapore Example: Healthcare

Healthcare allows students to discuss several potential market failures.

Depending on the question, these may include:

positive externalities;
imperfect information;
asymmetric information;
merit-good considerations; and
equity concerns.

Students should not automatically mention every possible market failure.

Identify the one relevant to the question and develop it properly.

Singapore Example: Education

Education can generate private benefits to students and wider benefits to society.

Government support can increase accessibility and consumption.

But evaluation might consider:

fiscal cost;
whether subsidies benefit those who would have consumed education anyway;
quality rather than quantity;
labour-market relevance; and
whether complementary policies are needed.

This turns a simple example into an evaluative one.

Common Market Failure Mistake 1: Saying “Externality” Without Identifying the Third Party

If you claim an externality exists, ask:

Who is affected?

For pollution:

Residents?

Other businesses?

Future generations?

For education:

Employers?

Other members of society?

Identify the external party.

Common Mistake 2: Confusing External Cost With Private Cost

A firm’s electricity bill is generally a private cost.

Pollution imposed on third parties may represent an external cost.

Students need to identify who bears the cost.

Common Mistake 3: Assuming Every Harmful Good Has an Externality

Something can be harmful to the consumer without necessarily creating an external cost.

Harm to oneself is a private cost.

To establish an externality, explain the effect on a third party.

Common Mistake 4: Confusing Merit Goods With Public Goods

These are different concepts.

Merit good

Associated with underconsumption, often linked to imperfect information and/or external benefits.

Public good

Defined by non-rivalry and non-excludability.

Do not use the terms interchangeably.

Common Mistake 5: Saying Government Intervention “Solves” Market Failure

Be careful with absolute language.

Policies may:

reduce;
mitigate;
correct partially; or
move the market closer to

the socially efficient outcome.

Perfect correction may be difficult because governments themselves face information and implementation constraints.

Common Mistake 6: Evaluating Without Context

Writing:

“It depends on PED.”

is incomplete.

Instead:

If demand for the good is relatively price inelastic, the higher price resulting from taxation may lead to only a small reduction in quantity demanded. The policy may therefore have limited effectiveness if the primary objective is to substantially reduce consumption.

Now the evaluation has meaning.

Common Mistake 7: Memorising One Market Failure Essay

Market failure questions can be framed in many ways.

Students may be asked about:

causes;
consequences;
specific externalities;
public goods;
information failure;
policy effectiveness;
comparison of policies; or
whether intervention is justified.

Understanding the framework is more useful than memorising one complete essay.

How to Structure a Market Failure Essay

A useful approach is:

Introduction

Define the relevant market failure.

Analysis 1

Explain why the free-market outcome is inefficient.

Diagram

Show the market and socially efficient outcomes where appropriate.

Policy 1

Explain how intervention works.

Evaluation 1

Assess effectiveness.

Policy 2

Explain an alternative.

Evaluation 2

Assess effectiveness.

Comparison

Compare using relevant criteria.

Conclusion

Reach a reasoned judgement based on the context.

The exact structure should always follow the question.

How to Draw an Externality Diagram

Students should understand rather than memorise the picture.

For a negative production externality, the important relationship is:

MSC > MPC

The free-market outcome reflects private incentives.

The socially efficient outcome considers social costs.

The difference between the two outcomes illustrates overproduction and welfare loss.

For positive externalities, the relevant relationship may involve:

MSB > MPB

leading to underconsumption relative to the socially efficient level.

Always ensure the diagram matches the specific externality being discussed.

How to Explain Welfare Loss

Do not simply shade an area and write:

“Deadweight loss.”

Explain why it exists.

For units beyond the socially efficient quantity in a negative externality case:

MSC > MSB.

This means the additional social cost of producing those units exceeds the additional social benefit.

Producing those units therefore reduces overall social welfare.

That is why the area represents welfare loss.

A Useful Market Failure Answering Framework

When you see a market failure question, ask:

1. What is the market failure?

Externality? Public good? Information failure?

2. Why does it arise?

Explain the mechanism.

3. What is the market outcome?

Overproduction? Underconsumption? Missing market?

4. Why is it inefficient?

Relate to MSB and MSC where appropriate.

5. What can the government do?

Explain the policy mechanism.

6. Will it work?

Evaluate.

7. Is there a better alternative?

Compare.

8. What is the final judgement?

Answer the question.

This framework prevents students from simply reproducing memorised policy lists.

Frequently Asked Questions About Market Failure

What is market failure in Economics?

Market failure occurs when the free market fails to allocate resources efficiently, resulting in a loss of social welfare.

What causes market failure?

Possible causes include externalities, public goods, imperfect information and asymmetric information, depending on the syllabus and context.

What is the difference between MPC and MSC?

MPC represents marginal costs borne privately by the decision-maker.

MSC includes both private and external costs.

Conceptually:

MSC = MPC + MEC.

What is the difference between MPB and MSB?

MPB represents marginal benefits received privately.

MSB includes private and external benefits.

Conceptually:

MSB = MPB + MEB.

What is a negative externality?

A negative externality occurs when an economic activity imposes costs on third parties that are not fully reflected in the market transaction.

What is a positive externality?

A positive externality occurs when an economic activity generates benefits for third parties that are not fully reflected in private decision-making.

Why do public goods cause market failure?

Non-excludability can create a free-rider problem, making it difficult for private firms to collect payment and provide the socially desirable quantity.

What is information failure?

Information failure occurs when economic agents lack sufficient or accurate information to make well-informed decisions.

What is the difference between adverse selection and moral hazard?

Adverse selection generally concerns hidden information before a transaction.

Moral hazard generally concerns hidden action or changed behaviour after a transaction.

How can governments correct market failure?

Policies can include taxation, subsidies, regulation, information provision, direct provision and market-based instruments such as tradable permits.

The appropriate policy depends on the source and context of the market failure.

Can government intervention make things worse?

Yes.

Imperfect information, administrative costs, unintended consequences and poor policy design can produce government failure.

Students should therefore evaluate whether intervention is likely to improve upon the original market outcome.

How Dr Anthony Fok Teaches Market Failure

Market failure is a topic where students frequently memorise diagrams and policies without fully understanding the underlying Economics.

At JC Economics Education Centre, students are taught to build the reasoning step by step:

Private incentives

→ External effect or information problem

→ Market outcome

→ Socially efficient outcome

→ Welfare loss

→ Government intervention

→ Policy mechanism

→ Evaluation

→ Judgement.

This makes it easier to adapt to unfamiliar essay and Case Study Question contexts.

About Dr Anthony Fok

All H1 and H2 Economics classes at JC Economics Education Centre are personally taught by Dr Anthony Fok.

Dr Anthony Fok is a former Ministry of Education teacher with more than 20 years of Economics teaching experience.

His academic qualifications include:

Bachelor of Accountancy (Honours), NTU

Bachelor of Economics, Murdoch University

Master of Education, Monash University

Postgraduate Diploma in Education, NIE

and

Doctor of Education.

He has authored more than 10 Economics guidebooks and specialises in preparing JC students for H1 and H2 A-Level Economics.

His teaching focuses on conceptual understanding, rigorous economic analysis, examination application, essay writing, Case Study Questions and evaluation.

Classes are available at Bishan, Tampines and Bukit Timah.

Final Revision Summary: Market Failure

Before an examination, make sure you can explain:

Market failure

Why the free market may allocate resources inefficiently.

Allocative efficiency

Why MSB = MSC matters.

Externalities

Why private and social costs or benefits may differ.

Negative externalities

Why they may lead to overproduction or overconsumption.

Positive externalities

Why they may lead to underproduction or underconsumption.

Public goods

Why non-rivalry and non-excludability can create the free-rider problem.

Information failure

Why incomplete or asymmetric information can distort decisions.

Adverse selection

Hidden information before a transaction.

Moral hazard

Hidden action or changed incentives after a transaction.

Government intervention

How taxes, subsidies, regulation, information, direct provision and other policies can affect incentives.

Government failure

Why intervention itself may be imperfect.

Evaluation

Whether the intervention actually improves the market outcome.

Do not memorise market failure as a collection of diagrams.

Understand the central question:

Why does the market outcome differ from the socially efficient outcome, and can intervention improve it?

Once students understand that logic, many market failure questions become much easier to analyse.

Students who would like structured guidance in H1 and H2 A-Level Economics can learn more about classes personally taught by Dr Anthony Fok at EconsTuitionCentre.com.sg.

Classes are available at Bishan, Tampines and Bukit Timah.

anthonyfok

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