📄 Ib Economics Paper1 Masterguide
Paper 1 — The Essentials
Fast facts
- Time: 1 hour 15 minutes + 5 min reading time
- Choice: 1 from 3 questions
- Total marks: 25 (10 + 15)
- Weight: 20% of final grade (HL) / 30% (SL)
- Coverage: All four units (Units 1–4)
- No calculator permitted
- No data extracts provided — unlike Paper 2
- You must bring real-world examples in your head
The three questions — what to expect
- Typically one question from Microeconomics, one from Macroeconomics, one from Global Economy/Development
- Each question has Part (a) [10 marks] and Part (b) [15 marks]
- Questions span all four units — Unit 1 could appear inside any question as context
- HL questions draw on HL-only content: market structures, monetarist model, Marshall-Lerner, asymmetric info, etc.
- You CANNOT predict which unit's question will appear — broad revision is essential
What the IB is actually testing
The IB wants you to think and write like an economist advising a policymaker. This means:
AO1 — Knowledge
Accurate definitions, correct theory, relevant concepts. The foundation.
AO2 — Application
Apply theory to the specific question. Link diagrams to text. Use real-world examples.
AO3 — Evaluation
Weigh up, balance arguments, reach a reasoned judgement. This is where top marks are earned.
AO4 (skills): Correctly labelled diagrams that are directly explained in the text. A diagram not mentioned in writing earns zero.
Choosing your question — how to decide in 5 minutes
- Read all three questions before committing — spend 3–4 min of reading time on this
- Ask: which question do I know the most diagrams for?
- Ask: do I have at least one strong real-world example for the Part (b)?
- Ask: can I genuinely evaluate — can I argue BOTH sides?
- Do NOT pick based on which topic sounds familiar if you can't draw the diagram or give a real-world example for Part (b)
- Beware of "easy-looking" Part (a) questions paired with tricky Part (b) questions you're unprepared for
Understanding the Mark Scheme (Examiner's Lens)
Part (a) — 10 marks: Band descriptors
| Marks | Band | What it looks like |
|---|---|---|
| 9–10 | Excellent | Clear, accurate definitions; well-labelled, correctly drawn diagram integrated into the explanation; thorough, logical analysis that directly addresses the question; fully explained cause-and-effect chain. |
| 7–8 | Good | Definitions present and mostly accurate; diagram drawn and referred to but minor omissions; analysis largely correct with some gaps in the chain of reasoning. |
| 5–6 | Satisfactory | Some correct definitions; diagram present but labelling incomplete or not well explained; partial analysis — some correct points but reasoning incomplete or vague. |
| 3–4 | Limited | Little definition; diagram absent or badly wrong; very little relevant economics; mostly descriptive without analysis. |
| 1–2 | Minimal | Only fragments of relevant knowledge; no structure. |
Part (b) — 15 marks: Band descriptors
| Marks | Band | What it looks like |
|---|---|---|
| 13–15 | Excellent | Balanced arguments for AND against; multiple specific real-world examples correctly applied; diagram if required; sophisticated evaluation with short-run/long-run, stakeholder, or contextual nuance; clear, reasoned conclusion with a genuine judgement. |
| 10–12 | Good | Some balance; at least one real-world example used correctly; analysis mostly correct; evaluation present but may be one-sided or lack nuance; conclusion present. |
| 7–9 | Satisfactory | Mostly one-sided; generic real-world example not closely linked; some evaluation but limited; conclusion weak or missing. |
| 4–6 | Limited | Only one side addressed; no real-world example; descriptive rather than evaluative. |
| 1–3 | Minimal | Fragments only; no evaluation. |
Hard cap rule: If your Part (b) only addresses one side of the argument, your mark is capped at 9. If you fail to consider any alternative argument or barrier, it is capped at 12. Balance is mandatory to access the top band.
What "evaluation" actually means to an examiner
- NOT: listing more pros and cons
- YES: weighing which argument is more significant and why
- YES: comparing short-run vs long-run effects
- YES: noting which stakeholders benefit and which don't
- YES: explaining under what conditions the argument holds or breaks down
- YES: concluding with a clear, justified judgement — not "it depends" with no further reasoning
How to Write Part (a) — 10 Marks
DEED structure for Part (a)
D — Define key terms
Define every economic term in the question stem immediately. Keep definitions precise (one to two sentences each). Do not write a long preamble — get straight to definitions. If the question says "explain the effect of a minimum wage on unemployment", define minimum wage AND unemployment clearly first.
E — Explain the theory/concept
Explain the relevant economic theory step-by-step. Use causal chains: "An increase in X leads to Y, because Z, which therefore causes W." Avoid vague assertions — every claim needs a "because." Think of explaining to someone intelligent who knows no economics yet.
E — embed a Diagram
Draw the diagram in the middle or end of your explanation — NOT separately before you write. Label everything: axes (with units), all curves, equilibrium points, any shifts. Then immediately explain what the diagram shows and link it to your written analysis. A diagram not mentioned in the text earns zero.
D — Develop the analysis
If asked to "explain two" things, structure clearly: "First... [DEED]. Second... [DEED]." For "distinguish" questions, explicitly state the contrast — do not just describe each separately. Link back to the question in your final sentence.
Diagram rules — non-negotiable
- Every axis must be labelled (e.g. "Price level (P)" not just "P")
- Curves must be labelled with names (e.g. AD₁, AD₂, SRAS, LRAS)
- Equilibrium points labelled (P₁, Q₁, P₂, Q₂ etc.)
- Shifts shown with arrows AND new label on the shifted curve
- Any shaded areas (CS, PS, DWL) must be explicitly identified in the text
- Diagram title optional but can help the examiner
- Draw large enough to be readable — small cramped diagrams lose marks
- If asked "using a diagram" — the diagram is compulsory; no diagram = maximum loss of AO4 marks
- If the question says "without a diagram" or "no diagram required" — do NOT draw one; use that time for writing
Sample Part (a) question & outline
Para 2 — Explain causes (C, I, G, X−M): Each component of AD can shift it rightward. E.g. A rise in consumer confidence raises C → AD shifts right. Lower interest rates raise I. Higher government spending raises G. Currency depreciation raises X and lowers M.
[Diagram here] AD/AS with AD shifting right from AD₁ to AD₂. Price level rises from P₁ to P₂. Real GDP rises from Y₁ to Y₂ (assuming SRAS upward-sloping).
Para 3 — Develop: As AD rises and the economy approaches full employment (LRAS), SRAS becomes steeper → price level rises more steeply relative to output. Inflationary gap opens when output exceeds potential (Y > Yf). In Keynesian model, beyond full employment the AS becomes vertical and further AD shifts only raise prices, not output.
How to Write Part (b) — 15 Marks
DEEDE structure for Part (b)
D — Define (briefly)
Brief intro with key term definition — but do NOT repeat what you wrote in Part (a). A cross-reference is fine: "As established in Part (a), inflation refers to..." This saves time for evaluation.
E — Explain the "for" case (with diagram if required)
Build the strongest case FOR the proposition in the question. Use economic theory, a diagram if relevant, and anchor it to a real-world example with country + time + policy + outcome.
E — Explain the "against" / counter-argument case
This is mandatory. Build the counter-argument. You MUST have this to access the top mark band. Use different real-world evidence if possible. Consider: limitations, unintended consequences, conditions under which the argument breaks down.
D — Develop nuance (CLASPP)
Add depth: short-run vs long-run? Which stakeholders gain/lose? Under what conditions does one argument dominate? Does context matter (developing vs developed country? Degree of openness? Starting point?).
E — Evaluate (conclusion with judgement)
Reach a clear, reasoned conclusion that takes a position. Do NOT just say "it depends" — say what it depends on and why. The examiner wants your economic judgement. A strong conclusion is 2–4 sentences that synthesise, not summarise.
Real-world example formula
Every real-world example needs four things to earn full credit:
✓ Country + time period
E.g. "The UK government in 2020–21" or "Japan in the 1990s–2010s"
✓ Policy or event
What happened: "introduced a fiscal stimulus of £350bn" or "kept interest rates near 0%"
✓ Economic outcome
What resulted: "unemployment rose to 8.5%" or "GDP contracted by 3.8%"
✓ Link to the argument
Explicitly connect: "This demonstrates that monetary policy is limited when the economy faces a liquidity trap"
You do NOT need perfect statistics. Approximate figures with clear economic explanation earn full marks. Never invent numbers — if unsure, describe qualitatively.
Command words — what each one demands
| Command word | What you must do |
|---|---|
| Explain | Give reasons, mechanisms, cause-and-effect chains. Diagram almost always needed. |
| Distinguish between | Explain both AND explicitly state how they differ. A contrast statement is mandatory. |
| Discuss | Present arguments for AND against; balanced analysis; reach a conclusion. Real-world examples needed. |
| Evaluate | Weigh up, consider evidence from multiple angles, make a final judgement with clear reasoning. |
| Compare and contrast | Both similarities AND differences must be explicitly identified. Side-by-side analysis preferred. |
| Recommend / suggest | Take a clear position AND justify it with theory and real-world evidence. Not just "I think". |
The CLASPP Evaluation Framework
C — Conclusion / Conditionality
What is the most likely outcome? Under what conditions does your argument hold? "This policy is effective IF the Marshall-Lerner condition is satisfied AND in the long run." Avoid a flat "it depends" — say what it depends on.
L — Long-run vs Short-run
Almost every economic policy has different short-run and long-run effects. "In the short run, the J-curve means depreciation worsens the current account. In the long run, as elasticities rise, the M-L condition is satisfied and the current account improves." This dimension alone can lift an answer by 2–3 marks.
A — Assumptions
What does the theory assume? What happens when those assumptions don't hold? "The Keynesian multiplier assumes a closed economy with no leakages. In a highly open economy with high MPM, the multiplier effect will be much smaller." Showing awareness of model limitations is exactly what AO3 rewards.
S — Stakeholders
Who wins and who loses? "A minimum wage benefits low-income workers (higher earnings) but may disadvantage employers (higher labour costs), consumers (higher prices), and potentially some workers (if unemployment results)." IB examiners love stakeholder analysis — it shows you understand that economic policy always involves trade-offs.
P — Priority / Policy Recommendation
Which approach should policymakers prioritise, and why? This is where you act as the economist advising the government. Be specific: "For a small open developing economy, supply-side policies focused on education investment are more sustainable than expansionary fiscal policy, which risks increasing debt." A clear, justified recommendation elevates your conclusion significantly.
P — Pros and Cons (balanced)
Ensure you have explicitly articulated arguments both for AND against before concluding. A one-sided essay is capped at 9/15 regardless of quality. This is the non-negotiable balance requirement.
CLASPP in action — quick template
AGAINST / limitations:
[A — assumptions] Assumes transmission mechanism works (banks pass on cuts; firms borrow; consumers spend). If consumer confidence is zero, rate cuts are ineffective.
[L — long-run] Japan: near-zero rates 1990s–2020s; persistent low growth and near-deflation — the liquidity trap. Monetary policy cannot fix structural unemployment.
[S — stakeholders] Low rates help debtors (firms, mortgagors) but hurt savers (pensioners, fixed-income) → distributional concerns.
[A — assumptions] Cannot address structural/frictional unemployment — only cyclical. Supply-side policies needed for NRU.
CONCLUSION [C + P]: Monetary policy is most effective at reducing cyclical unemployment when the economy is operating well below potential and the banking system is functioning. For structural unemployment, or when rates are near zero (liquidity trap), supply-side policies are preferable. A combination of expansionary monetary policy and targeted labour market reform offers the best outcome.
Topic Frequency — Based on Nov 2024, May 2025, Nov 2025 HL Papers
Microeconomics questions — frequency
Macroeconomics questions — frequency
Global Economy questions — frequency
Key pattern: Market failure appears in every micro question. Macroeconomic objectives appear in every macro question. Development economics anchors every global economy question. These three are the safest bets to prepare deeply.
Most Likely Question Types — Compiled from Past Papers & Forums
🔥 Highest-probability Micro questions
- "Using a diagram, explain how a negative externality of production leads to market failure. [10] / Using real-world examples, evaluate policy options available to correct this market failure. [15]"
- "Explain why public goods are underprovided by the free market. [10] / Discuss the view that government provision is always the best solution for public goods. [15]"
- "Using diagrams, distinguish between normal profit and abnormal profit. [10] / Evaluate whether monopoly is always harmful to society. [15]" HL
- "Explain how a minimum price (price floor) affects the market. [10] / Evaluate the effectiveness of a minimum wage as a policy to reduce poverty. [15]"
- "Explain the concept of asymmetric information. [10] / Evaluate government policies to address market failure caused by information asymmetry. [15]" HL
🔥 Highest-probability Macro questions
- "Using diagrams, distinguish between inflationary and recessionary (deflationary) gaps. [10] / Evaluate the effectiveness of fiscal policy in closing a recessionary gap. [15]"
- "Using an AD/AS diagram, explain the causes of cost-push inflation. [10] / Evaluate the possible consequences of inflation for different groups in society. [15]"
- "Explain two tools a central bank can use to conduct expansionary monetary policy. [10] / Evaluate the effectiveness of monetary policy to achieve low unemployment. [15]"
- "Using Phillips curve diagrams, explain the relationship between inflation and unemployment. [10] / Using real-world examples, compare and contrast the policy implications of the short-run and long-run Phillips curves. [15]" HL
- "Explain the difference between the Keynesian and Monetarist views of the AS curve. [10] / Evaluate whether demand-side or supply-side policies are more effective in promoting long-run economic growth. [15]"
🔥 Highest-probability Global Economy questions
- "Explain how a tariff affects domestic consumers and producers. [10] / Using real-world examples, evaluate the arguments for and against trade protection. [15]"
- "Using an exchange rate diagram, explain how a fall in interest rates may affect the exchange rate. [10] / Evaluate the consequences of currency depreciation for a country's economy. [15]"
- "Explain the concept of comparative advantage. [10] / Evaluate whether free trade always benefits developing countries. [15]" HL
- "Explain the barriers to economic development facing low-income countries. [10] / Evaluate the relative effectiveness of market-oriented vs interventionist strategies for economic development. [15]"
- "Using a diagram, explain trade creation and trade diversion in a customs union. [10] / Evaluate the costs and benefits of economic integration for member countries. [15]" HL
Real-World Examples Bank — Memorise These
Microeconomics examples
- Negative externality (production): UK sugar tax (2018) — HMRC levy on sugary drinks reduced consumption. Sales of high-sugar drinks fell ~30%. Classic demerit good / negative externality of consumption.
- Carbon pricing: EU Emissions Trading System (ETS) — cap and trade for CO₂. Carbon price rose to €90/tonne (2023). Internalises negative externality of production.
- Positive externality: South Korean education spending — government subsidies for education and R&D helped drive growth from low-income to high-income country. Spillover benefits justify intervention.
- Market power / monopoly: Google (US, EU) — fined €2.4bn by EU (2017) for abusing dominant position. Monopoly pricing, barriers to entry (network effects, data).
- Asymmetric information: 2008 financial crisis — banks sold mortgage-backed securities without buyers understanding true risk (moral hazard). Led to collapse of Lehman Brothers.
- Minimum wage: UK Living Wage (£10.42/hr in 2023) — raised incomes for lowest-paid workers; limited evidence of significant unemployment from academic studies (Card & Krueger).
Macroeconomics examples
- Fiscal stimulus: US American Recovery and Reinvestment Act (2009, $787bn) — response to 2008 crisis. GDP stabilised; unemployment peaked at 10% then fell. Keynesian multiplier argument.
- Monetary policy / liquidity trap: Japan 1990s–2020s — near-zero interest rates for decades; quantitative easing; still experienced deflation and stagnation. Classic liquidity trap limitation.
- Inflation / cost-push: Post-COVID inflation (UK/EU, 2021–23) — energy price spike + supply chain disruption shifted SRAS left. UK CPI hit 11.1% (Oct 2022). ECB/Bank of England raised rates.
- Stagflation: 1973 oil crisis — OPEC embargo quadrupled oil prices. SRAS shifted left → high inflation + high unemployment in US, UK, Germany simultaneously.
- Austerity: Greece 2010–15 — IMF/ECB-imposed fiscal consolidation. GDP fell ~25%; unemployment hit 27%. Trade-off between debt reduction and recession deepening.
- Inequality: Brazil — Bolsa Família conditional cash transfer programme. Reduced extreme poverty; Gini coefficient fell from 0.59 (2001) to 0.53 (2015).
Global economy examples
- Trade protection: US-China trade war (2018–19) — US imposed 25% tariffs on $250bn of Chinese goods. Retaliation; both suffered welfare losses; supply chains disrupted.
- Comparative advantage: East Asian Tigers (South Korea, Taiwan, Singapore) — exploited comparative advantage in manufacturing to drive export-led growth from low to high income.
- Exchange rate depreciation: Turkish lira (2021–22) — fell ~80% vs USD. Exports cheaper; imports more expensive; inflation surged above 80% — cost-push from import prices.
- Monetary union crisis: Greece/Eurozone 2010–15 — could not devalue; faced internal devaluation (wage cuts). OCA conditions not met; asymmetric shock with no fiscal union.
- Development — interventionist: Grameen Bank, Bangladesh — Muhammad Yunus's microfinance model. Provided credit to 9mn+ poor borrowers; raised incomes; Nobel Peace Prize 2006.
- Washington Consensus failure: IMF SAPs in sub-Saharan Africa 1980s–90s — austerity, privatisation, trade liberalisation; slow growth, rising poverty, deteriorating public services (Stiglitz critique).
- Export-led success: China 1978–2010 — opened to trade (SEZs), undervalued exchange rate, export manufacturing. GDP grew ~10%/year; 800m+ lifted out of poverty.
Versatile examples (use across multiple topics)
- 2008 Global Financial Crisis — applies to: fiscal policy, monetary policy (QE), market failure (asymmetric info, moral hazard), banking regulation, economic growth
- COVID-19 pandemic (2020–21) — applies to: AD/AS shocks (SRAS left), fiscal stimulus, monetary policy, unemployment, supply-side disruption, development setbacks
- Post-COVID inflation (2021–23) — applies to: cost-push inflation, monetary policy response, wage-price spiral, central bank credibility
- EU / Eurozone — applies to: monetary union (OCA), trade creation/diversion, fiscal policy constraints, exchange rate management
- Japan "lost decades" (1990s–2020s) — applies to: liquidity trap, monetary policy limitations, deflation, ageing population as supply-side barrier
Most Common Mistakes — From Examiners & High-Scoring Students
❌ Drawing a diagram and not explaining it
A diagram earns zero marks if it is not directly referred to and explained in the text. Every curve, every shift, every labelled point must be mentioned. "As shown in the diagram above, when AD shifts right from AD₁ to AD₂..." is the minimum standard.
❌ One-sided Part (b)
Arguing only FOR (or only AGAINST) a policy is automatically capped at 9/15. The mark scheme explicitly requires balanced evaluation. Even if you strongly agree with one side, you must present the counter-argument fully.
❌ Generic or invented real-world examples
"A country raised taxes and the economy grew" earns minimal credit. "Germany's fiscal surplus under the Schuldenbremse (debt brake) and its effect on public investment" earns full credit. Be specific: country + time + policy + outcome. Never invent statistics.
❌ Vague conclusions ("it depends")
Ending with "overall, it depends on many factors" without specifying what it depends on and why earns zero evaluation marks for the conclusion. Say: "It depends primarily on whether the Marshall-Lerner condition holds; for commodity-exporting developing countries with inelastic export demand, depreciation is unlikely to improve the current account in the short run."
❌ Long introductions that earn no marks
Students often write a paragraph explaining what the essay will cover. This is wasted time. Get directly to your definition and first analytical point. Every sentence should be earning marks.
❌ Incomplete diagram labelling
Missing axis labels, unlabelled shifts, no equilibrium points — all lose AO4 marks. Examiners have a checklist. Spend 90 extra seconds labelling the diagram correctly. Common omissions: forgetting to label the new curve (AD₂ instead of just a new line), forgetting axis units.
❌ Restating Part (a) in Part (b)
Do not repeat your Part (a) definitions or analysis wholesale. A brief cross-reference is enough. Use the time to evaluate. Examiners credit new analytical and evaluative content in Part (b) — they do not re-credit work already rewarded in Part (a).
❌ Confusing command words
"Explain" ≠ "Evaluate". If asked to evaluate, you must weigh and judge — not just explain more. If asked to "compare and contrast", you must state both similarities AND differences explicitly — not describe each separately. Students who miss the command word lose the top band.
Timing Strategy & Exam Day Checklist
Recommended time allocation
| Activity | Time | Notes |
|---|---|---|
| Reading time — choose question | 5 min | Read all three. Pick the one where you can draw the diagram AND have a real-world example for Part (b). |
| Quick plan (both parts) | 3–4 min | Bullet the main points, diagram to draw, real-world example, CLASPP points for Part (b). |
| Part (a) — write | 20–22 min | Definition → theory → diagram (mid-text) → development. Stop at 22 min regardless. |
| Part (b) — write | 44–46 min | FOR case → AGAINST case → CLASPP nuance → conclusion. Most marks here — don't rush. |
| Quick review | 2 min | Check: diagram labelled? Both sides covered? Real-world example linked? Conclusion has a judgement? |
Pre-exam preparation strategy
- Prepare "skeleton answers" for the 12–15 most likely question types. A skeleton = definitions + diagram list + FOR points + AGAINST points + 2 real-world examples. You can build these in 20 min each.
- One real-world example per diagram — know a specific example for every diagram in the course (about 15 diagrams total). These are your insurance policy for Part (b).
- Practise timed Part (b) answers — take a Part (b) question, set a 45-minute timer, and write it in full. Mark yourself against the band descriptors. This is the single most effective preparation activity.
- Read economics news in the 2–3 weeks before the exam — current examples (post-2022) show the examiner you engage with real economics, not just textbook cases.
- Make a "master evaluations list" — for each main policy (fiscal, monetary, supply-side, trade protection, exchange rate policy), write 3 arguments for and 3 against with CLASPP dimensions.
Exam day final checklist ✓
- ✓ Read all three questions in reading time
- ✓ Chose question where I can draw diagram AND have a real-world example
- ✓ Wrote a 3-min plan before writing anything
- ✓ Defined all key terms in Part (a)
- ✓ Drew diagram in the middle of my Part (a) writing
- ✓ Labelled every axis, curve, point, and shift on my diagram
- ✓ Explicitly referred to my diagram in the text
- ✓ Part (b): argued BOTH sides clearly
- ✓ Used at least one specific real-world example (country + time + policy + outcome)
- ✓ Applied at least 2–3 CLASPP dimensions
- ✓ Written a conclusion with a clear, reasoned judgement
- ✓ Did not repeat Part (a) wholesale in Part (b)
- ✓ Stopped Part (a) at 22 min to protect time for Part (b)