IB Economics Paper 1 May 2025
IB Economics May 2025 Paper 1 SL Analysis. A comprehensive guide to IB Economics Paper 1 Learn about how you could answer this paper properly and why.
IB ECONOMICS SL
Lawrence Robert
4/14/202620 min read
IB Economics May 2025 Paper 1 Topic by Topic
This is my personal analysis of every topic area tested in the IB Economics May 2025 SL Paper 1 - what the examiner was in my opinion really looking for, the content you need to master, and step-by-step instructions on how to structure a high-scoring response.
Lawrence's note 1: I don't reproduce IB copyrighted exam papers or materials, as this would be unauthorised use, reproduction, distribution, or display of copyrighted material, and therefore, would violate the exclusive rights of the IB Institution. I just make a summary from a teacher's point of view, of everything you actually need to prepare in order to be successful at a paper 1 similar to this one.
1 hour 15 minutes - 25 marks total - Choose One question and answer - Three sets of questions available each containing 1 (10 marks) + 1 (15 marks) questions.
Lawrence's Note 2:
What follows is not a set of predicted questions or a likely topics list. This would not be realistic and be wary of websites and sources that sell "predicted questions" for IB Economics. This is a topic-by-topic breakdown of what the IB Economics Board actually tested in May 2025, written to help my students understand the depth of knowledge required in each area of the IB Economics paper, and teach them how to approach this particular paper and papers similar to this one.
Unlike other exam boards, the IB rarely / never rewards memory reproduction / memorising alone.
Every topic here was examined in a way that required genuine economic reasoning, and that is what this page prepares you for IB Economics Evaluation + reasoning + Critical thinking.
The May 2025 paper had a different "feel" to it. Market failure dominated the microeconomics question - but with slight variations that caught some of my students off guard: a direct comparison between two intervention tools rather than a standard pros-and-cons evaluation. The macroeconomics question went deep into Keynesian theory, and the international economics question combined trade theory with a supply-side policy debate. All three Part (b) questions rewarded students who could think comparatively and apply critical thinking, and penalised those students who answered through descriptions and who learnt the subject by heart.
Question 1 - Microeconomics
Public Goods, Merit Goods & Government Intervention Tools
An unlikely question on market failure categories, followed by a direct comparison of two intervention policies
1A- Distinguish [10 marks] Public goods vs merit goods - two different types of market failure, two different reasons for intervention
Topics Needed: Public Goods, Merit Goods, Market Failure, Microeconomics
What the command term "Distinguish" Requires for 10 marks and why is it more difficult that the command term "Explain"
"Distinguish" is a more demanding command word than "explain" at SL. It requires you to show not just what each concept is, but you need to show with precision how they differ from each other. A response that defines both correctly but never explicitly contrasts them, cannot reach the top mark band. The contrast should run throughout your answer - not just appear in a final sentence or conclusion.
Core Content You Need To Master
A public good is defined by two technical characteristics: non-excludability (it is impossible to prevent non-payers from consuming it) and non-rivalry (one person's consumption does not reduce the amount available to others)
The consequence of these characteristics is the free-rider problem - rational individuals have no incentive to pay voluntarily, so the private market produces zero or far below the socially optimal quantity. This is complete market failure
Classic public goods: national defence, street lighting, public health surveillance, flood defences
A merit good is not defined by non-excludability or non-rivalry - it is a private good that is underprovided by the free market because consumers undervalue it relative to its true social benefit
The cause of merit good under-provision is information failure - consumers are not fully aware of the long-term private and social benefits of consuming the good, leading to demand below the socially optimal level
Merit goods also generate positive externalities - their consumption benefits third parties beyond the direct consumer, meaning MSB > MPB at the market equilibrium quantity
Classic merit goods: education, healthcare, vaccinations, public libraries
The key distinguishing contrast: public goods fail because the market cannot supply them at all (non-excludability destroys the profit motive); merit goods fail because the market supplies them, but at less than the optimal quantity
Diagrams You Must be Able to Draw
Public good diagram: a market failure diagram showing zero private provision - supply curve absent or at zero - because producers cannot charge non-payers
Merit good diagram: a positive externality diagram showing MPB below MSB, private equilibrium quantity Q₁ below the socially optimal quantity Q*, and the welfare loss triangle
Using both diagrams side by side visually reinforces the distinction and demonstrates that these are fundamentally different types of market failure
How to Structure Your Answer
Open with the overarching distinction: both are cases of market failure, but for fundamentally different reasons
Define public good - non-excludable and non-rival - and explain why these characteristics cause complete market failure via the free-rider problem. Draw the public goods diagram
Define merit good - a private good undervalued by consumers due to information failure - and explain why this causes under-provision rather than zero provision. Draw the merit good diagram
Contrast the nature of the failure: public goods - market cannot exist; merit goods - market exists but produces below optimal quantity
Contrast the reasons: public goods - structurally impossible to exclude users; merit goods - consumer information failure and positive externalities
Contrast the policy implication: public goods typically require direct government provision; merit goods can be addressed through subsidies, regulation, or persuasion
Where Did Most Of My students Lose Marks?
Maximum 6 marks if only public goods or merit goods are addressed, OR if no differentiation is made between the two goods. This double condition is important - even if both goods are defined, a response that describes them separately without explicitly contrasting them cannot exceed 6. The most common error was treating this as two separate "explain" answers with no comparative or contrasting work. A distinguish question requires contrast throughout - different characteristics, different causes of market failure, different policy implications. Students who confused merit goods with public goods - treating non-excludability as a feature of merit goods - lost marks from the beginning.
Master These topics at the IB Trainer:
1B- Evaluate - 15 [Marks] - Price ceilings vs subsidies for raising merit good consumption - a direct policy comparison
Price Ceilings - Subsidies - Government Intervention - Merit Goods - Microeconomics
What does Evaluate Require?
Maximum 9 marks if only price ceilings OR only subsidies are evaluated. Both tools must be substantively covered to access the top half of the mark range. The question framed this as evaluating the view that price ceilings are more effective than subsidies - so the structure should be: build the case for price ceilings being more effective, then challenge it by showing where subsidies are superior. Students who discussed price ceilings and subsidies in general terms without anchoring the comparison specifically to the increase of merit good consumption did not answer the question fully. The merit good context - underconsumption due to information failure - must run through the entire response, not just appear in the introduction or the conclusion.
Core Content You Need To Master
How a price ceiling raises consumption: a maximum price set below the equilibrium price makes the good more affordable, increasing quantity demanded - particularly relevant for lower-income consumers who were previously priced out
Price ceiling limitations: it reduces the price but also reduces the incentive for producers to supply - a shortage emerges (Qd > Qs at the ceiling price). If supply contracts significantly, consumption may not rise as intended or quality may deteriorate
Real-world price ceiling examples relevant to merit goods: rent controls, capped prescription drug prices, regulated energy prices for essential services
How a subsidy raises consumption: a production subsidy reduces the cost of supply, shifting the supply curve rightward and reducing the market price - consumption rises as the good becomes more affordable without creating a shortage
Subsidy advantages over price ceilings: subsidies work with the market mechanism rather than against it; supply rises alongside demand, so no shortage is created; producers maintain incentives to supply and potentially to innovate
Subsidy limitations: fiscal cost to government - the subsidy must be funded through taxation or borrowing; risk of deadweight loss if the subsidy is poorly targeted; does not necessarily address the information failure that causes merit good underconsumption in the first place
Information failure problem: neither policy fully solves the underlying cause of merit good under-provision - consumers may still undervalue the good even if its price falls. This is a limitation both instruments share
The elasticity of supply and demand matters: if demand is price-inelastic (as it can be for some merit goods like healthcare), neither tool may generate large increases in consumption even if price falls significantly
Diagrams You Must Be Able To Draw
Price ceiling diagram: a supply and demand diagram with a maximum price P_max below equilibrium P*, showing quantity supplied contracting to Qs and quantity demanded expanding to Qd - the shortage (Qd − Qs) clearly marked
Subsidy diagram: supply and demand diagram showing supply shifting rightward from S to S+subsidy, price falling from P* to P_sub, quantity consumed rising from Q* to Q_sub - no shortage, no supply contraction
A merit good positive externality diagram puts both instruments in context - both are trying to shift actual consumption toward the socially optimal quantity Q*
How to Structure Your 15 Mark Answer
Briefly establish the problem: merit goods are under-consumed because consumers undervalue them; government intervention aims to close the gap between private and socially optimal consumption
How price ceilings raise consumption: lower price increases affordability and quantity demanded - rent controls or capped drug prices as examples. Draw the price ceiling diagram
Limitations of price ceilings: shortage created as supply contracts; quality may deteriorate; black markets may emerge; the gain in consumption may be partially or wholly offset by supply reduction
How subsidies raise consumption: supply increases and price falls without creating a shortage - consumers pay less and producers still receive an adequate return. Draw the subsidy diagram
Advantages of subsidies over price ceilings: no shortage; supply maintained or expanded; works with the price mechanism rather than distorting it; can be targeted at specific merit goods (school meals, vaccination programmes)
Shared limitation: neither tool addresses the information failure at the root of merit good underconsumption - a complementary information campaign may be needed alongside either policy
Justified conclusion: subsidies are generally more effective than price ceilings for raising merit good consumption because they avoid the shortage problem, maintain producer incentives, and increase both supply and demand simultaneously - but fiscal cost and targeting quality are real constraints on their effectiveness
Where Did Some Of My students Lose Marks?
Students who wrote about price ceilings and subsidies in general terms - listing standard advantages and disadvantages - without anchoring the analysis to merit goods specifically did not answer the question fully. The comparison had to be made in the context of raising merit good consumption. Students who reached a clear verdict ("subsidies are more effective because X, Y, Z") consistently outscored those who ended with "both have advantages and disadvantages" without committing to a position.
Master These topics at the IB Trainer:
Question 2 - Macroeconomics
The Keynesian Recessionary Gap & GDP per Capita as a Welfare Measure
Deep Keynesian theory on persistent recessions, then a critical evaluation of GDP per capita as a well-being indicator
2A- Explain [10 Marks] The Keynesian deflationary gap - why recessions can persist without self-correction
Keynesian Model - Recessionary Gap - AD / AS - Module 3 Macroeconomics
Why "Persistent" And Keynesian Model Are Both Essential To Your Answer
This question was not simply asking what a recessionary gap is - it was asking why, according to the Keynesian model specifically, it can persist. That distinction is completely relevant. The classical model predicts automatic self-correction through wage and price flexibility. The Keynesian argument is that this mechanism fails in practice, and the gap can endure indefinitely without government intervention. Any answer that ignored the word "persistent" or failed to engage with why the classical correction does not operate missed the main part of the question.
Core Content You Need To Master
A deflationary (recessionary) gap exists when actual real GDP is below potential output - the economy is operating inside its productive frontier with unemployment above the natural rate
In the AD/AS framework: AD has fallen (or is insufficient), and the economy is in equilibrium at Y₁ below the full employment level Y*
Why the gap is persistent in the Keynesian view - wage and price stickiness: Keynes argued that wages are downwardly rigid in practice. Workers resist nominal wage cuts; trade unions, contracts, and efficiency wage considerations all prevent wages from falling to clear the labour market
Why wage stickiness matters: in the classical model, falling wages reduce production costs, shift SRAS rightward, and restore full employment. If wages don't fall, this self-correction mechanism does not operate
Deficient aggregate demand as the root cause: the Keynesian model places weak AD at the centre of the problem - if consumer confidence is low, investment is depressed, or the economy has experienced an external demand shock, AD may remain persistently below the level required for full employment
The paradox of thrift: as individuals and firms try to save more during a recession (rational individually), aggregate demand falls further - the collectively rational response deepens the very problem it was meant to address
Animal spirits and investment volatility: Keynes argued that investment depends heavily on business confidence ("animal spirits") rather than just interest rates - in a deep recession, confidence collapses and investment stays depressed regardless of interest rate cuts
The liquidity trap: if nominal interest rates approach zero, monetary policy loses its traction - the central bank cannot stimulate enough investment to close the gap. This makes the recession self-reinforcing
The Keynesian conclusion: because automatic self-correction is unreliable or absent, only expansionary fiscal policy - government spending or tax cuts to boost AD - can close the recessionary gap reliably
Diagrams You Must Be Able To Draw
Keynesian AD/AS diagram: a horizontal or upward-sloping SRAS with AD intersecting at Y₁ below Y* - the recessionary gap clearly marked as (Y* − Y₁)
The diagram should show that without a shift in AD, the economy remains stuck at Y₁ - there is no automatic mechanism pulling it back to Y*
Optional but strong: show the classical prediction (wages fall, SRAS shifts right, restores Y*) alongside the Keynesian counter-argument (wages are sticky, SRAS does not shift)
How to Structure Your Answer
Define a deflationary gap - actual output below potential, unemployment above the natural rate - and draw the Keynesian AD/AS diagram
Explain the classical self-correction argument briefly - why the Keynesian model was developed in opposition to it
Keynesian reason 1 - Wage stickiness: workers and unions resist nominal wage cuts; wages do not fall to clear labour markets; SRAS does not shift right automatically
Keynesian reason 2 - Deficient AD persistence: if consumer confidence is shattered and investment has collapsed, AD remains weak regardless of price-level changes. The paradox of thrift deepens the problem
Keynesian reason 3 - Investment and animal spirits: business confidence may remain depressed for years after a shock; interest rate cuts alone cannot restore investment if firms see no profitable opportunities
Keynesian reason 4 - Liquidity trap: if nominal rates hit zero, monetary policy is exhausted; the gap persists unless government directly increases spending
Conclude by reinforcing the Keynesian policy prescription - only government intervention via fiscal policy can reliably close the gap
Where Did Some Of My students Lose Marks?
Students who described a recessionary gap without explaining why it persists answered only part of the question. The persistence is the Keynesian contribution - the argument that markets do not self-correct quickly or reliably. Students who gave a single reason (usually wage stickiness alone) also left marks on the table. The question asked for the Keynesian model's full explanation, which involves multiple reinforcing mechanisms. Students who attributed self-correction to the Keynesian model - confusing it with the classical view - lost marks from the beginning.
Master These topics at the IB Trainer:
IB Economics Macroeconomic Equilibrium
2B- Discuss [15 marks] Real GDP per capita as an indicator of economic well-being - usefulness and limitations
GDP per capita - Economic well-being - Development indicators - Module 3 Macroeconomics
What does Discuss The Usefulness Require?
This is an evaluate-style question framed as "discuss." You need to show where GDP per capita genuinely works as a well-being indicator - and where it fails. The word "usefulness" means you are assessing a tool, not just describing it. The strongest responses were specific about what GDP per capita measures well, precise about what it misses, and concluded with a reasoned overall assessment of GDP's value in relation to alternatives.
Core Content You Need To Master
What real GDP per capita measures: total real output of an economy divided by population - it gives a standardised, cross-country comparable measure of average material living standards adjusted for inflation
Where it is genuinely useful: consistent methodology across countries makes international comparison possible; strong positive correlation with access to food, shelter, healthcare, and education; useful for tracking living standard changes over time within a country
Limitation 1 - Income distribution ignored: GDP per capita is an average - a country with extreme inequality may have a high GDP per capita while the majority of its population lives in poverty. South Africa and Brazil are clear examples where averages hide severe distributional inequality
Limitation 2 - Non-market activity excluded: unpaid household work, voluntary services, and subsistence farming are not captured in GDP - these contribute significantly to well-being in many lower-income economies
Limitation 3 - Environmental and sustainability costs ignored: GDP rises when natural resources are extracted and depleted; environmental degradation, pollution, and climate costs are not deducted. Growth that destroys natural capital appears as a gain in the statistics
Limitation 4 - Composition of output ignored: GDP does not distinguish between output that directly enhances well-being (healthcare, education) and output that does not (arms production, financial speculation). A country spending heavily on defence and rebuilding after natural disasters will show high GDP
Limitation 5 - Leisure, freedom, and security not measured: two countries with identical GDP per capita may differ enormously in working hours, personal freedom, crime rates, and social trust - these basic features are not registered by GDP
Alternative indicators: the Human Development Index (HDI) combines GDP per capita with life expectancy and education; the Happy Planet Index adds well-being and sustainability; the Genuine Progress Indicator adjusts GDP for inequality and environmental costs
How to Structure Your 15 Mark Answer
Define real GDP per capita and explain how it is calculated - real GDP adjusted for inflation, divided by population
Where it is useful: allows cross-country comparison; tracks material living standard trends over time; correlates meaningfully with basic development indicators - Norway vs. Niger illustrates its broad discriminatory power
Limitation 1 - Inequality: South Africa or Brazil - high GDP per capita average masks extreme distributional inequality; most citizens experience living standards far below the average
Limitation 2 - Non-market activity: subsistence agriculture and informal economies (significant in many Sub-Saharan African nations) are excluded - GDP understates actual living standards in these contexts
Limitation 3 - Environment and sustainability: GDP rises as forests are cleared and oil is extracted - the depletion of natural capital that sustains future well-being is recorded as a gain, not a cost
Limitation 4 - Composition and quality: GDP counts arms production and disaster reconstruction the same as education and healthcare spending - the contribution to well-being is very different
Alternative indicators: HDI registers health and education dimensions that GDP misses; note why composite indicators are more useful but also more complex and harder to construct comparably across countries
Conclusion: real GDP per capita is a useful starting point for comparing material living standards at a high level, but its failure to capture distribution, sustainability, and non-material dimensions of well-being means it should always be used alongside broader indicators rather than in isolation
Where Did Some Of My students Lose Marks?
Students who only listed limitations without acknowledging where GDP per capita is genuinely useful did not produce a balanced discussion. This is a "discuss" question - the usefulness is real, and dismissing it entirely is not a suitable base for a good answer. The best responses treated GDP per capita as a useful but incomplete tool, and concluded with a specific recommendation: use it alongside HDI or other composite measures for a more complete picture of well-being. Generic conclusions ("GDP has advantages and disadvantages") without a concrete overall judgement scored in the middle bands.
Master These topics at the IB Trainer:
IB Economics Measuring Economic Activity
IB Economics Measuring Economic Activity Beyond GDP
IB Economics Economic Development
Question 3 - The Basis for International Trade & Interventionist Supply-Side Policies
Why countries trade at all, then evaluating the state's role in driving growth through supply-side intervention
3A- Explain [10 marks] Why countries engage in international trade - the theoretical foundations and practical drivers
International Trade - Comparative Advantage - Absolute Advantage - Module 4 Global Trade
What this question required. Theory together with real reasons.
This question asked for an explanation of why countries trade - which means engaging with both the theoretical rationale (comparative advantage) and the practical reasons (resource endowments, economies of scale, product variety). A response covering only comparative advantage theory - without connecting it to the real patterns of trade - was narrower than the question required. A response covering only practical reasons without theoretical grounding lacked rigour.
Core Content You Need To Master
Absolute advantage: a country has an absolute advantage when it can produce a good using fewer resources (more efficiently) than another country - but absolute advantage alone does not fully explain why trade occurs
Comparative advantage - the core theory: even if one country is more efficient at producing all goods, both countries can gain from trade if each specialises in the good in which it has the lowest opportunity cost of production. This is the fundamental theoretical basis for international trade
A simple two-country, two-good numerical example strengthens this explanation considerably - show that specialisation and exchange allows both countries to consume beyond their individual production possibility frontiers
Differences in factor endowments: countries trade because they are endowed with different quantities of land, labour, capital, and natural resources. Saudi Arabia exports oil not because of comparative advantage alone but because the resource exists there in abundance. The Heckscher-Ohlin model extends comparative advantage to explain trade patterns through factor endowments
Economies of scale: specialisation allows firms to produce at greater volumes, reducing average costs. Countries trade to allow domestic industries to reach the scale that makes them internationally competitive - explains intra-industry trade between similar countries (e.g. EU car manufacturers trading with each other)
Product variety and consumer preferences: consumers value variety beyond what any single economy can produce efficiently - trade allows access to a wider range of goods and services, raising consumer welfare even between similarly developed economies
Technology differences: countries with superior technology in specific sectors export those goods - the technology gap theory of trade
Diagrams / Graphs That Strengthen Your Answer
PPC diagram showing gains from specialisation: two countries with different opportunity costs; show how specialisation and trade allows consumption beyond the individual PPC frontier
A simple production possibility table (numerical example) can substitute for or complement the PPC diagram and is highly effective for illustrating comparative advantage clearly
How to Structure Your Response
Open with the central point: countries trade because specialisation according to comparative advantage raises total output and allows both parties to consume more than they could in isolation
Define and explain comparative advantage - lowest opportunity cost, not necessarily absolute efficiency. Use a simple numerical example or PPC diagram
Explain how specialisation and exchange generates mutual gains - both countries move beyond their individual production frontiers
Factor endowments: explain why differences in land, labour, capital, and natural resources create natural specialisation patterns - Brazil's agricultural exports; Germany's industrial exports
Economies of scale: trade allows domestic industries to serve a larger market, achieving lower average costs - explains why the EU's single market generates efficiency gains beyond comparative advantage alone
Variety and consumer welfare: trade provides access to goods that domestic production cannot supply efficiently or at all - enriching consumer choice and raising living standards
Where Did Some Of My students Lose Marks?
Students who explained comparative advantage but stopped there answered the question partially. "Why countries trade" is broader than comparative advantage alone - factor endowments, economies of scale, and consumer variety are all genuine explanations that the mark scheme rewards. Students who gave a numerical example of comparative advantage without drawing a diagram, or who drew a PPC without explaining the opportunity cost logic, also left marks available. The diagram needs to work close to the written explanation, not be isolated from the arguments.
Master These topics at the IB Trainer:
IB Economics International Trade
IB Economics Comparative Advantage
3B- Discuss [15 Marks] Interventionist supply-side policies for growth and development - how effective are they?
Supply-side policies - Economic Development - Economic Growth - Module 3 Macroeconomics
What Interventionist Supply-side means
Supply-side policies divide into two families: market-oriented (deregulation, privatisation, tax cuts) and interventionist (government actively investing in education, infrastructure, industrial policy, R&D). This question was specifically about the second family. Maximum 9 marks if only growth OR only development is discussed - both dimensions must be addressed. Students who discussed market-oriented supply-side policies were not answering the question at all. The interventionist label needed to run through your entire response.
Core Content You Need To Master
Interventionist supply-side policies defined: government actions that directly increase the productive capacity of the economy through public investment, regulation, and strategic industrial policy - rather than by removing barriers to market operation
Policy 1 - Investment in education and training: raises human capital; increases labour productivity and workforce skills; expands the productive frontier over time. South Korea's state-directed education system as a driver of sustained growth is a landmark example
Policy 2 - Public infrastructure investment: roads, ports, energy grids, broadband - reduces production costs across all sectors, attracts private investment, connects markets. China's state-led infrastructure push 2000–2020; EU structural funds for regional infrastructure
Policy 3 - Industrial policy and strategic sector support: government targets specific industries for subsidies, R&D support, or trade protection to develop comparative advantage - South Korea's chaebol model; Japan's MITI-directed industrial development; modern semiconductor support (US CHIPS Act, EU Chips Act)
Policy 4 - Public R&D investment: many foundational technologies (internet, GPS, touchscreens) originated from state-funded research - government investment in basic research generates long-run productive capacity gains that markets undersupply due to positive externalities
Limitation 1 - Government failure and inefficiency: governments may back the wrong industries; political considerations distort resource allocation; state enterprises can be less efficient than private competitors (Soviet industrial policy as a cautionary tale)
Limitation 2 - Time lags: education investment takes a generation to raise workforce productivity; infrastructure takes years to plan and build; the benefits of interventionist supply-side policies accrue slowly, creating political pressure for short-term AD policies instead
Limitation 3 - Fiscal constraints: interventionist supply-side policies require public expenditure - countries with high debt ratios or limited tax capacity (many ELDCs) may not be able to fund them at the required scale
Development dimension: for ELDCs, interventionist supply-side policies may be particularly important where market failures are pervasive and private investment in education and infrastructure is insufficient - but institutional capacity to implement them effectively is often also weakest precisely where the need is greatest
Diagrams That Strengthen Your Response
AD/AS diagram showing LRAS shifting rightward - interventionist supply-side investment expanding productive capacity over time
PPC diagram - outward shift of the frontier as human capital and physical capital improve
A positive externality diagram for education - showing how state investment corrects the market's under-provision of human capital
How to Structure Your 15 Mark Answer
Define interventionist supply-side policies and distinguish them from market-oriented supply-side policies - this framing is essential right from the beginning
Policy 1 - Education and human capital: explain the mechanism (investment → higher skills → productivity → LRAS shift); South Korea's development trajectory as evidence
Policy 2 - Infrastructure: public investment reduces production costs and attracts private capital; China's infrastructure-led growth; EU structural fund effectiveness in Ireland and Portugal
Policy 3 - Industrial policy: strategic sector targeting can build comparative advantage where markets would not - semiconductor policy in South Korea and Taiwan; modern examples in the US and EU
Counterargument 1 - Government failure: picking winners is difficult; political distortions are real; inefficient state enterprises can entrench rather than solve market failures
Counterargument 2 - Time lags and fiscal cost: benefits are slow and expensive; developing economies may lack the fiscal space and institutional capacity to implement effectively
Conclusion: interventionist supply-side policies have a strong record in East Asian development models and are gaining renewed credibility in advanced economies - but their effectiveness depends critically on institutional quality, fiscal capacity, and the ability to avoid political capture of the investment process
Where Did Some Of My students Lose Marks?
The most serious error was discussing market-oriented supply-side policies (deregulation, privatisation, tax cuts) rather than interventionist ones. This showed the question had not been read carefully. Students who discussed both types - even if they flagged the distinction - still diluted their answer by including material the question did not ask for. The word "interventionist" had to shape the entire response. Students who used South Korea, Singapore, or Japan as examples of state-directed industrial policy scored well; students who used generic references to "developed economies" without specifics did not.
Master These topics at the IB Trainer:
IB Economics Supply-side Policies
IB Economics Economic Development
IB Economics 10 Epic Strategies for Economic Growth
A Quick Look At The Exam
Paper: Paper 1 SL
Date: May 2025
Duration: 1h 15m
Total marks: 25
Structure: Choose 1 question out of 3
Part (a) 10 marks
Part (b) 15 marks
Topics Tested
Q1a Public goods vs merit goods · 10marks
Q1b Price ceilings vs subsidies · 15marks
Q2a Keynesian recessionary gap · 10marks
Q2b GDP per capita & well-being · 15marks
Q3a Why countries trade · 10marks
Q3b Interventionist supply-side policies · 15marks
Key Command Words
Distinguish - explicit contrast required throughout; not two separate explanations
Explain - chain of causation; multiple reasons needed; diagrams essential
Discuss - two sides; real examples; clear overall judgement
Evaluate - both sides; challenge the comparison; commit to a verdict
Frequently Asked Questions About this Paper
These were some of the questions my students asked about the May 2025 SL exam.
Question 1(a) used "distinguish" rather than "explain" - does that change what I need to write?
Significantly. "Distinguish" is more demanding than "explain" because it requires you to show how two concepts differ from each other - not just define each one separately. A response that defines public goods and merit goods correctly but never explicitly contrasts them cannot reach the top mark band. The contrast should be present throughout your answer: different characteristics, different causes of market failure, different policy implications. A simple two-column approach in your planning (public good / merit good) can help you structure the comparisons before you write.
For Question 2(a), is it enough to explain what a recessionary gap is and draw the AD/AS diagram?
No - the question asked specifically why the gap can be persistent according to the Keynesian model. That means you need to engage with the mechanisms that prevent automatic self-correction: wage stickiness, deficient aggregate demand, the paradox of thrift, and the liquidity trap. The diagram shows the gap; the written explanation needs to show why the economy cannot escape from it on its own. Students who drew the diagram and explained the gap without explaining the persistence mechanism answered a different - easier - question.
In Question 1(b), could I argue that price ceilings are more effective than subsidies in some circumstances?
Absolutely - and a well-argued case for price ceilings in specific contexts (such as when the goal is specifically to improve affordability for the poorest consumers, or when government budgets cannot fund a subsidy) would demonstrate sophisticated evaluation. The question used "evaluate" - it expected you to engage critically with both sides of the comparison. What it did not reward was a conclusion that said "both are equally effective" or one that avoided committing to one of the views. You can argue for price ceilings in some conditions as long as your reasoning is specific and economically grounded.
Question 3(b) specified "interventionist" supply-side policies - would marks have been lost for discussing deregulation or privatisation?
Yes. Deregulation, privatisation, and tax cuts are market-oriented supply-side policies - the opposite family from interventionist ones. Including them showed the question had not been read carefully, and the marks for that content would not count at all. The distinction between interventionist and market-oriented supply-side policies is a fundamental IB Economics classification and one that examiners expect students to use precisely. If you are revising for future papers, this distinction is worth insisting on - it appears frequently.
For Question 2(b) on GDP per capita, do I need to know specific HDI or GDP data for different countries?
Approximate figures are far better than no figures, but precision matters less than relevance. Knowing that Norway consistently ranks near the top of both HDI and GDP per capita tables, while a country like South Africa has a relatively high GDP per capita but a much lower HDI ranking due to extreme inequality and health challenges, demonstrates genuine knowledge. You do not need exact numbers - but referencing a country, its approximate position, and the specific dimension in which GDP per capita figures provide incomplete or wrong information for that country is the level of specificity that earns top-band marks.
Stay well,
Read More About:
IB Economics Hub Page your IB Economics daily guide
IB Economics Diagrams Page Check this resource for All the IB Economics syllabus diagrams with explanations
IB Economics Activity book Page More IB Economics exam practice, activities, model answers and IB Economics Marking schemes
Read Next: IB Economics Exam Paper 1 November 2024
© Theibtrainer.com 2012-2026. All rights reserved.
Legal
Have a Tip? Send us a tip using our anonymous form