The economic cycle.

HookThe month the economy stopped

ModelThe cycle — four phases and how to spot them

Economies do not grow in straight lines; they cycle through boom (rapid growth, low unemployment, rising inflation, skill shortages), downturn (growth slowing), recession and recovery. The definition that earns the mark: a recession, by UK convention, is two consecutive quarters of falling real GDP. 'Real' matters — real GDP strips out price changes, so you are measuring actual output, not inflation dressed up as growth.

Britain's recent case history gives you one example of each severity. 2008–09: GDP fell roughly 6% peak-to-trough, and unemployment kept climbing for two more years, reaching about 8.4% in late 2011 — unemployment is a lagging indicator, because firms cut hours and freeze hiring before they cut jobs, and rehire late. 2020: the deepest but also one of the shortest recessions on record. And the second half of 2023: a 'technical recession' of −0.1% then −0.3% — two negative quarters, so the definition bites, but so shallow that many households never noticed. The lesson examiners like: the definition is binary, severity is a judgement, and good answers quote the numbers that show which kind they are looking at.

ModelThe circular flow — the economy's plumbing

The circular flow of income is the model underneath everything macro. Households supply labour to firms and receive incomes; they spend those incomes on firms' output; firms use the revenue to pay wages again. Income, expenditure and output are the same flow measured at three points — which is why GDP can be calculated three ways and should, in principle, give one answer.

The flow leaks and refills. Withdrawals take spending out: saving, taxation, imports. Injections put spending in: investment, government spending, exports. When injections exceed withdrawals the flow expands and national income rises; when withdrawals exceed injections it contracts. That single sentence is the analytical engine for most 2.5 chains.

COVID is the model in action. Lockdown stopped households spending, so firms' revenue collapsed, so incomes were about to collapse — and furlough was a giant government-spending injection wired directly into household incomes to stop the loop unwinding. Strip the jargon and furlough was the state standing in for the missing part of the circular flow.

ModelInflation — the basket, the target, the two engines

Inflation is a sustained rise in the general price level, measured in the UK by the Consumer Prices Index: the ONS tracks a basket of around 700 representative items, weighted by how households actually spend, and refreshes it yearly — hand sanitiser entered in 2021; air fryers and vinyl records in 2024. The government's target, delivered by the Bank of England, is 2%.

Two engines drive it, and telling them apart is the core skill. Demand-pull inflation: total spending outruns the economy's capacity — post-lockdown Britain, flush with enforced savings, reopening all at once. Cost-push inflation: production costs rise and firms pass them on — Russia's February 2022 invasion of Ukraine sent European gas prices vertical, Ofgem's energy price cap jumped 54% in April 2022, and CPI peaked at 11.1% that October. The 2022 episode was overwhelmingly cost-push, which mattered for policy: higher interest rates cannot lower the price of imported gas.

Who gets hurt: savers (the real value of deposits erodes whenever inflation outruns interest rates), workers on fixed pay, lenders repaid in shrunken pounds. Borrowers with fixed-rate debts quietly gain, since the real burden of the debt shrinks. Firms face menu costs and pricing uncertainty; exporters lose competitiveness if UK inflation outruns rivals'.

ModelUnemployment — two counts, four causes

Britain counts its jobless twice. The claimant count tallies people claiming unemployment-related benefits — cheap and monthly, but narrow: plenty of jobless people claim nothing (savings, a partner's income, ineligibility). The Labour Force Survey uses the ILO definition — out of work, actively sought work in the last four weeks, available to start within two — and is the internationally comparable measure, usually the higher of the two. Neither counts the economically inactive: students, carers and the long-term sick are outside the labour force entirely.

The four causes carry the analysis marks. Cyclical: demand collapses in a recession and jobs go with it — 2009–11. Structural: an industry declines or skills stop matching jobs — when the SSI steelworks at Redcar closed in October 2015, roughly 2,200 direct jobs went, nearer 3,000 with contractors, in a town where steel had been the anchor employer for over a century. Frictional: people between jobs — some is healthy in any churning labour market. Seasonal: Cornish hospitality every winter.

The costs ripple outward: individuals lose income and, with long spells, skills and confidence ('scarring'); firms face weaker demand; the government pays more in benefits while collecting less tax; the economy wastes capacity. And the cause dictates the cure — cutting interest rates does nothing for a steel town whose industry is gone, and retraining schemes do nothing for a demand collapse. Diagnose before you prescribe.

VocabularyKey terms the mark scheme pays for

TrapsMisconceptions that cost marks

ExamWhat examiners want