A small country strikes gas off its coast. Within a decade the rigs are humming, exports are booming, and its own factories are closing one by one. The windfall was real. So was the damage. That paradox has a name — Dutch disease, after the Netherlands’ North Sea gas boom — and its mechanics are what many second-years bring to an economics tutor in Doha.
1 · A small open economy with three sectors
An economy has three kinds of production.
The resource sector — the new gas fields — sells at a world price and earns large rents, so it can outbid anyone for workers.
The traded sector, call it manufacturing, also sells at a world price: it competes with imports and cannot raise its price at home.
The non-traded sector — services, construction, restaurants — sells only at home, so its price is set by domestic demand. You cannot import a haircut.
Two facts do the work. Labour is mobile, so every sector pays the same wage w; and total labour L̄ is fixed, so more workers in one sector means fewer in another. When “the traded sector” contracts, it means this lagging manufacturing — the resource sector is traded too, but it booms.
2 · The resource-movement effect
The boom’s first pull is direct. The resource sector wants workers, and its rents let it pay more than they earned before. To staff the rigs, it bids the wage up.
Every other sector now faces that higher wage. Manufacturing, pinned to a world price, cannot pass it on, so it responds the only way it can: it hires fewer workers and contracts. This is the resource-movement effect — the boom bids labour away by lifting the wage every sector must match. No home price has changed; just a wage the world-price sector cannot absorb.
3 · The spending effect and real appreciation
The second pull runs through income. A richer country spends more on housing, meals, services — non-traded goods. You cannot meet a surge in restaurant demand with imports, so their price PN is bid up.
Traded goods are different: their price PT is fixed on the world market. So the ratio PN/PT rises — home goods become dearer relative to world-priced ones. That ratio is the real exchange rate, and a rise in it is a real appreciation. No currency need strengthen anywhere; the relative price of what the country makes at home has risen on its own.
A higher PN makes non-traded output more profitable, so that sector expands and bids for labour too, squeezing the world-priced manufacturing sector a second time. This is the spending effect.
4 · Why the traded sector carries the cost
Put the two effects together. The resource sector has rents to pay the higher wage; non-traded services have a higher price to cover it; manufacturing has neither, so it shrinks. The crowding-out of the traded sector is not a side effect of Dutch disease — it is the disease.
Does it matter? A smaller factory sector might be efficient reallocation. But manufacturing is often thought to be where productivity growth is learned, as extraction and services are not; lose the factories in the boom, and when the gas is gone no dynamic sector is left. That learning-by-doing case is the reason to take the disease seriously, though the spillovers are debated.
Policy has some grip on the second channel: the spending effect can be dampened by saving much of the revenue abroad rather than spending it at home, so PN rises less. How much to save, and how to smooth spending over time, is a separate question with its own apparatus.
Worked example — a stylised gas economy
Total labour is L̄ = 100. Manufacturing’s labour demand — the wage for the LT-th worker — is w = 100 − LT. The rest of the economy (resource plus non-traded), measured from the other end, demands labour at w = a − LR, with LR = 100 − LT and intercept a. Before the boom a = 100.
Step 1 — Equilibrium condition. Labour is mobile, so the wage is equal across sectors: 100 − LT = a − (100 − LT).
Step 2 — Base case. With a = 100: 100 − LT = LT, so LT = 50, w = 50, and the rest holds LR = 50.
Step 3 — Read it. Half the workforce makes traded goods, half does everything else, both paid 50 — the economy before it finds gas.
Step 4 — Resource-movement effect. The gas fields bid for labour, lifting the rest’s intercept to a = 112. Re-solve: 100 − LT = 112 − (100 − LT) = 12 + LT, so LT = 44 and w = 56. Manufacturing has lost 6 workers, and no home price has moved yet.
Step 5 — Spending effect. The windfall is spent, PN climbs, and the intercept lifts to a = 130. Re-solve: 100 − LT = 30 + LT, so LT = 35 and w = 65. Manufacturing loses 9 more.
Step 6 — Resolve. Traded employment has fallen from 50 to 35 — down 15 — while the rest grows to 65 and the wage climbs to 65. The channels split the loss: 6 from the resource-movement effect, 9 from spending.
Step 7 — Interpret. Nothing shut manufacturing by choice. It sold at a fixed world price while the wage and home-service prices rose around it. Rising PN against a fixed PT is the real appreciation; the falling LT is the de-industrialisation — one boom, one squeezed sector.
Can you derive who wins and who loses from a resource boom — from the equal-wage condition, not the headline? Splitting the traded sector’s loss into the resource-movement and spending effects is exactly what examiners reward on this topic. A one-on-one economics tutor rebuilds the two-origin labour diagram with you until the mechanism is yours. Book a trial session.
Practice
Q1. In the base model (w = 100 − LT, w = a − LR, L̄ = 100), a smaller boom lifts the rest’s intercept to a = 120. Find the new equilibrium and the change in traded employment.
Q2. From a = 100, resource-movement lifts the intercept to a = 110 and spending then to a = 124. Find traded employment after each stage, and the workers each effect costs manufacturing.
Q3. The government saves the whole windfall abroad, switching the spending effect off: the intercept rises only to a = 112, not a = 130. Find traded employment with and without the policy, and the jobs it preserves.
Answers. Q1: 100 − LT = 20 + LT, so LT = 40, LR = 60, w = 60 — traded employment falls from 50, down 10. Q2: at a = 110, LT = 45 (resource-movement costs 5); at a = 124, LT = 38 (spending costs a further 7); total 12. Q3: with saving LT = 44, without it 35 — the policy preserves 9 jobs, exactly the spending-effect loss.
Key takeaways
- The traded sector bears it. A fixed workforce and a common wage mean a boom that pulls labour in pulls it from manufacturing — the crowding-out is the mechanism of Dutch disease, not an accident.
- Two channels, same victim. The resource-movement effect lifts the wage; the spending effect lifts non-traded prices. Both squeeze manufacturing, pinned to a world price.
- Real appreciation is a relative price, not a currency move. PN/PT rising is the appreciation, with or without any foreign-exchange move.
- Why it may bite later. If manufacturing is where productivity growth is learned, losing it can cost the economy once the gas runs out — the standard argument, though debated.
Why Doha students choose our economics tutoring
- Models derived, not memorised: you build the two-sector labour diagram from the equal-wage condition, so you can rebuild it under exam pressure.
- The distinctions examiners reward: resource-movement versus spending effect, real versus nominal appreciation, traded versus non-traded.
- In person across Qatar, or online: one-on-one sessions, matched to your own module and past papers.
- Tutors who work from your syllabus: whether your open-economy macro follows Corden, Krugman–Obstfeld or Carlin–Soskice, the notation stays yours.
FAQ
Q: What is Dutch disease?
A: A natural-resource boom shrinking a country’s manufacturing. It raises wages and home-service prices that manufacturing, a world-price seller, cannot cover, so the sector contracts.
Q: What is the difference between the resource-movement and spending effects?
A: The resource-movement effect bids labour away by raising the wage. The spending effect raises non-traded prices as the windfall is spent, pulling labour toward them. Both shrink the traded sector.
Q: Why does the real exchange rate appreciate without the currency changing?
A: It means non-traded goods becoming dearer relative to world-priced traded goods — a rise in PN/PT that domestic spending alone can drive.
Q: Which sector gains and which loses?
A: The resource sector and non-traded services expand; traded manufacturing contracts. Only sectors that earn rents or raise prices can afford the higher wage.
Q: Can a country avoid it?
A: It can soften the spending effect by saving much of the windfall abroad, limiting the rise in non-traded prices. The resource-movement effect is harder to offset.
Book an economics tutor in Doha or online
Resource economics rewards the student who can derive the mechanism — the equal-wage condition, the two channels, the real appreciation — not just recite the label. One-on-one sessions build that fluency on your own past papers. Tell us your module and exam date, and we will match you with a tutor this week.
