IBDP · Economics HL
Macroeconomics
3.1–3.7
52 min readAdvancedThe largest of the four IB Economics units — supplies at least one Paper 1 essay option every session, dominates Paper 2 data-response for the HL/SL common questions, and is the main source of Paper 3 HL-only calculation questions (multiplier, reserve ratios, real GDP).
Macroeconomics is where IB Economics stops being abstract and starts reading like the news — central banks hiking rates, budgets in deficit, Gini coefficients rising. HL adds three things that never appear at SL: the Keynesian AS curve with its three regions, the expenditure multiplier (and the smaller tax multiplier), and the vertical long-run Phillips curve. Every essay and every data-response answer in this unit rewards the same skeleton — define, diagram, trace the causal chain, then evaluate with a specific magnitude, time lag or side-effect. Learn that skeleton once and it carries every subtopic below.
Overview — the shape of the unit
Why examiners keep coming back to this unit
- Macro sits at the intersection of every real-world data set you'll see in the exam — central bank statements, budget documents, inflation reports. The command term is almost never 'describe'; it's 'explain the impact' or 'evaluate the effectiveness'.
- SL and HL share the core AD/AS model, the four objectives, and the two demand-side policies. HL layers on quantitative work (multiplier arithmetic, reserve ratio calculations) and two extra diagrams (Keynesian AS, long-run Phillips curve) that SL students never have to draw.
- The recurring exam scenario across almost every real paper is the same policy dilemma: a central bank fighting inflation with rate hikes while growth slows — Chile 2023, India 2022, Country X above are the same story with different numbers. Recognise the pattern and half the analysis writes itself.
- Fiscal and monetary policy are always compared, never taught in isolation — expect 'compare and contrast' or 'to what extent' questions asking which tool suits a given scenario better.
The shape of the chapter
Command terms this unit tests hardest
| Command term | What it demands | AO | Mark-earning move |
|---|---|---|---|
| Define | State the precise meaning — e.g. interest rate as 'the cost of borrowing / reward for saving, set by the central bank' | AO1 | 1–2 marks; no explanation needed, but a vague synonym ('the price of money') without the borrowing/lending context loses the mark. |
| Explain | Give a reasoned causal chain with a mechanism — e.g. rate rise → borrowing costs up → C and I fall → AD falls | AO2 | Marks awarded per correct causal link; stopping after one link ('rates go up so spending falls') caps you at half marks. |
| Distinguish | State the difference between two terms using ONE clear discriminator each way, not two separate definitions | AO2 | Two isolated definitions with no comparative link ('X means... Y means...') scores lower than a direct contrast. |
| Calculate | Show every step of the working, not just the final number | AO2 | Own-figure rule applies — an arithmetic slip early on still earns method marks if later steps use it correctly. |
| Analyse | Break the issue into components and use a diagram/model to support each one | AO3 | A diagram with no reference to it in the text earns diagram marks only — you must narrate what the diagram shows. |
| Evaluate | Weigh strengths against limitations and reach a justified conclusion | AO3 | A one-sided answer (all costs, no benefits, or vice versa) is capped — examiners look for a genuine 'on the other hand'. |
Key point
Every AD/AS-family diagram needs labelled axes (Price level; Real GDP/Real output), labelled curves, and a labelled equilibrium point — examiners deduct marks for an otherwise-correct shift with no axis labels, even at HL.
Overview