Policies to improve allocation and correct market failure
Policies to improve allocation and correct market failure: build the core model, apply it to evidence and qualify conclusions where outcomes depend on context.
Section 8.1 · Government policies to achieve efficient resource allocation and correct market failure
9708 section 8.1; A Level. Checked against Cambridge's 2026–2028 Version 2 (latest version published December 2025) and 2029 Version 1 (published September 2026). Cambridge states that neither version has significant changes affecting teaching. Always follow the syllabus for the candidate's examination year.
Before you begin
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
Which policy instrument fixes the total number of permits available for pollution?
What you will learn
- Apply and evaluate policies for different forms of market failure
- Explain government failure, its causes and consequences
Core model and terms
Choose an instrument to fit the source of failure. A specific indirect tax adds a fixed amount per unit; an ad valorem tax is a proportion of value. Subsidies can encourage activities with external benefits. Binding price controls, quotas, prohibitions and licences alter access or quantities. Regulation and deregulation change how firms may operate: regulation sets a rule, while deregulation removes one. Direct provision can secure services when private supply is inadequate.
Apply and evaluate
Pollution permits set a monitored emissions cap and allow trading, while property rights can clarify who may use a resource. Nationalisation and privatisation change ownership and accountability, not outcomes automatically. Information and behavioural nudges can address knowledge gaps or decision patterns. Government failure occurs when intervention worsens allocation; imperfect information, administrative costs, capture, political incentives and unintended responses can all contribute. Compare likely outcomes, distribution, enforcement and cost against the original failure.
Pause and explain
Which statement best applies policies to improve allocation and correct market failure?
Worked example
A city wants to reduce emissions from a known set of factories. Compare the central trade-off between an emissions tax and tradable permits.
Show the worked solution
- A tax fixes the charge per unit but total emissions respond to firms’ choices
- A permit cap fixes the allowed quantity but trading determines the permit price
- Monitoring, information and abatement-cost uncertainty affect which is more suitable
Answer A tax fixes the charge per unit but total emissions respond to firms’ choices → A permit cap fixes the allowed quantity but trading determines the permit price → Monitoring, information and abatement-cost uncertainty affect which is more suitable
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
A city wants to reduce emissions from a known set of factories. Compare the central trade-off between an emissions tax and tradable permits.
Give me a hint
Compare which instrument fixes the price and which fixes the quantity.
Compare my reasoning
- A tax fixes the charge per unit but total emissions respond to firms’ choices
- A permit cap fixes the allowed quantity but trading determines the permit price
- Monitoring, information and abatement-cost uncertainty affect which is more suitable
A tax fixes the charge per unit but total emissions respond to firms’ choices A permit cap fixes the allowed quantity but trading determines the permit price Monitoring, information and abatement-cost uncertainty affect which is more suitable
Look for these in your work
- A tax fixes the charge per unit but total emissions respond to firms’ choices
- A permit cap fixes the allowed quantity but trading determines the permit price
- Monitoring, information and abatement-cost uncertainty affect which is more suitable
A tax is $4 per plastic bag. A 20% ad valorem tax applies to a $3 bag. Calculate each tax and explain one difference.
Give me a hint
Apply the fixed amount in one case and the percentage to price in the other.
Compare my reasoning
- Specific tax = $4 per bag
- Ad valorem tax = 0.20 × $3 = $0.60
- The specific charge stays fixed per unit while the percentage tax rises with price
Specific tax = $4 per bag Ad valorem tax = 0.20 × $3 = $0.60 The specific charge stays fixed per unit while the percentage tax rises with price
Look for these in your work
- Specific tax = $4 per bag
- Ad valorem tax = 0.20 × $3 = $0.60
- The specific charge stays fixed per unit while the percentage tax rises with price
A subsidy is given for home insulation to address energy use. Explain one intended effect and one possible limitation.
Give me a hint
Trace the lower private cost, then identify an assumption or side effect.
Compare my reasoning
- The subsidy lowers the effective cost of insulation
- More households may invest and reduce energy use
- Uptake depends on awareness, eligibility, landlord incentives and whether savings offset the fiscal cost
The subsidy lowers the effective cost of insulation More households may invest and reduce energy use Uptake depends on awareness, eligibility, landlord incentives and whether savings offset the fiscal cost
Look for these in your work
- The subsidy lowers the effective cost of insulation
- More households may invest and reduce energy use
- Uptake depends on awareness, eligibility, landlord incentives and whether savings offset the fiscal cost
A licensing rule reduces the number of legal fishing boats. Explain one intended benefit and one risk to allocation.
Give me a hint
Consider the resource problem and who can obtain a licence.
Compare my reasoning
- A limit may reduce pressure on a fish stock
- Scarcity rents can rise for licence holders
- Poorly designed allocation or monitoring may exclude users unfairly or leave illegal fishing
A limit may reduce pressure on a fish stock Scarcity rents can rise for licence holders Poorly designed allocation or monitoring may exclude users unfairly or leave illegal fishing
Look for these in your work
- A limit may reduce pressure on a fish stock
- Scarcity rents can rise for licence holders
- Poorly designed allocation or monitoring may exclude users unfairly or leave illegal fishing
Common mistakes
- Assuming a policy succeeds because it is announced, or treating government failure as proof that every intervention worsens welfare.
What can you explain now?
Which policy instrument fixes the total number of permits available for pollution?
Compare with the explanation
A monitored tradable-permit cap
The cap sets a quantity limit while trading determines the permit price.
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Make it stick
Before moving on, explain the central idea in policies to improve allocation and correct market failure and state one condition that could change its effect.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.