Cambridge A Level Economics: Employment, unemployment and labour mobility (9708) – Revision Notes

These notes condense section 9.3 (Employment/unemployment), outcomes 9.3.1 to 9.3.7, of the Cambridge International AS & A Level Economics 9708 syllabus for examination in 2026, 2027 and 2028. Topic 9 is A Level content only and is not examined at AS. For full explanations read the study guide, then test yourself with the practice questions. Track coverage on the course hub and the checklist, and use a free 10-minute diagnostic to find weak spots. All figures here are invented for illustration and are not real statistics.

Definitions to recall

Term	Definition
Full employment (9.3.1)	All those prepared and able to work at the prevailing wage can obtain a job; some frictional and structural unemployment remains
Equilibrium unemployment (9.3.2)	Unemployment that exists when the labour market clears at the equilibrium wage
Disequilibrium unemployment (9.3.2)	Labour supplied exceeds labour demanded at the going wage (real-wage or demand-deficient)
Hysteresis (9.3.2)	Unemployment that persists after its cause ends, because the equilibrium rate itself has risen
Voluntary unemployment (9.3.3)	Choosing not to accept work at the going wage
Involuntary unemployment (9.3.3)	Would accept work at the going wage and can do it, but no vacancy exists
Natural rate (9.3.4)	Unemployment remaining once the labour market has cleared: frictional, structural and voluntary
Geographical mobility (9.3.6)	Ability and willingness to move area for work
Occupational mobility (9.3.6)	Ability and willingness to change type of job

Formulas and quick calculations

Measure	Formula
Labour force	Employed + unemployed
Unemployment rate (%)	Number unemployed divided by labour force, times 100
Participation rate (%)	Labour force divided by working-age population, times 100
Employment rate	Employed ÷ working-age population × 100
Natural unemployment (number)	Natural rate × labour force
Cyclical unemployment	Actual unemployment − natural unemployment
Replacement rate	Out-of-work benefit ÷ net pay in work × 100
Payback period (moving or retraining)	One-off cost ÷ net annual gain
Jobs from extra output	Rise in national income ÷ output per worker
Cost per additional job	Cost per participant ÷ share who gain a job they would not otherwise have had

Worked reminder. Country C has a labour force of 40.0 million, an actual rate of 8.0% and a natural rate of 5.5%.

Actual unemployed  = 8.0% × 40.0m = 3.2 million
Natural            = 5.5% × 40.0m = 2.2 million
Cyclical           = 3.2 − 2.2    = 1.0 million (2.5 percentage points)

If supply-side reform cuts the natural rate to 4.5%, natural unemployment falls to 1.8 million.

Method boxes

Labour market diagram (disequilibrium).

1. Label the vertical axis as the wage and the horizontal axis as labour quantity. Draw a downward-sloping demand curve and an upward-sloping supply curve.
2. Mark the equilibrium wage and quantity.
3. Draw the wage floor above equilibrium. Read employment from the demand curve and the labour supplied from the supply curve.
4. The horizontal gap is the number unemployed. The part not willing to work at the lower equilibrium wage was never involuntarily unemployed.

Example. Demand L = 500 − 10w, supply L = 10w − 100, in thousands of workers. Equilibrium is w = 30, L = 200. At a floor of 36, demand is 140 and supply is 260, so 120 thousand are unemployed.

Natural rate and AD (chain of reasoning).

1. Government raises AD to push unemployment below the natural rate.
2. Output moves beyond full employment, an inflationary gap opens, and labour is scarce.
3. Firms raise wages and prices, so the gain in jobs is only temporary.
4. Lasting reduction needs a supply-side shift that lowers the natural rate.

Hysteresis (chain). Recession → long spells of joblessness → skills decay, contacts are lost, employers screen out long gaps → equilibrium rate rises → unemployment stays high even when demand recovers.

Must-know distinctions

Pair	Key point
Full employment vs zero unemployment	Full employment still has natural unemployment
Equilibrium vs disequilibrium	Equilibrium is on the supply and demand crossing; disequilibrium is above it or from a demand fall
Voluntary vs involuntary	Willing to work at the going wage or not
Cyclical vs natural	Cyclical responds to AD; natural responds to supply-side factors
Geographical vs occupational	Moving place vs changing job type
Demand-side vs supply-side policy	AD for cyclical; skills, incentives and mobility for structural and frictional

Determinants of the natural rate

• Raise it: generous benefits, strong unions and minimum wages, skills mismatch, low mobility, poor information, hysteresis.
• Lower it: flexible labour markets, effective training, good job-matching, housing that allows moves.

Mobility factors

• Geographical: housing costs and availability, moving costs, family and community ties, information about vacancies, transport, immigration rules and language.
• Occupational: training cost and time, transferable skills, licences and entry requirements, age and employer attitudes, knowledge of other careers.
• Worked reminder. A worker gains 3,600 cu a year in pay, pays 1,800 cu more in rent and faces a one-off cost of 7,200 cu. Net gain = 3,600 − 1,800 = 1,800 cu. Payback = 7,200 ÷ 1,800 = 4.0 years.

Patterns and trends: what to look for

• The cycle: unemployment rises in recessions and falls in booms, often with a lag.
• Structural change: employment shifts between sectors, so some regions and age groups lose out.
• Group differences: youth, the low-skilled, long-term unemployed and particular regions.
• Participation: a falling rate may reflect workers leaving the labour force.

Worked reminder. A country has a working-age population of 30.0 million, 17.1 million employed and 0.9 million unemployed. Labour force = 18.0 million; unemployment rate = 0.9 ÷ 18.0 = 5.0%; participation = 18.0 ÷ 30.0 = 60.0%. If 0.3 million of the unemployed stop looking, unemployed = 0.6 million, labour force = 17.7 million and the rate = 0.6 ÷ 17.7 = 3.4%, yet nobody has found a job.

Policy summary

Policy	Best against	Main limit
Fiscal or monetary expansion	Cyclical	Inflation, deficit, lags
Training, education	Structural	Slow, costly
Lower or time-limited benefits	Voluntary	Poverty, weaker demand
Lower employer labour taxes, wage subsidies	Structural	Cost, deadweight
Job-matching, information	Frictional	Small scale
Relocation help, regional policy	Geographical	Cost, can drain the region
Labour market flexibility	Real-wage	Lower pay, insecurity

Worked reminder. Government spending rises by 0.6 billion cu and the multiplier is 2.5, so national income rises by 0.6 × 2.5 = 1.5 billion cu. With output per worker of 30,000 cu, jobs created = 1.5bn ÷ 30,000 = 50,000. If cyclical unemployment is 120,000, 70,000 remain, and any structural unemployment is untouched.

Evaluation checklist: type of unemployment, size of the multiplier, time lags, cost, side effects (inflation, inequality, deficit), whether hysteresis has set in, and the short-run versus long-run view.

Quick self-test

1. State the formula for the unemployment rate and calculate it for 0.8 million unemployed and 11.2 million employed.
2. A labour force of 25.0 million has a natural rate of 4.0% and an actual rate of 7.0%. How many are cyclically unemployed?
3. In the demand L = 500 − 10w and supply L = 10w − 100 market, find unemployment at a wage floor of 36.
4. Define hysteresis in one sentence.
5. Replacement rate: benefit 200 cu, net pay 10 cu × 35 hours at 10% tax. Calculate it.
6. Give two determinants that raise the natural rate.
7. Employment is 250 thousand in year 1 and 240 thousand in year 3. Calculate the year 3 index (year 1 = 100).
8. Why can an expansion of AD not permanently reduce unemployment below the natural rate?
9. Name two factors reducing occupational mobility.
10. A policy costs 3,000 cu per participant, and 50% gain jobs they would not otherwise have found. Find the cost per additional job.

Answers

1. Unemployed ÷ (employed + unemployed) × 100 = 0.8 ÷ 12.0 × 100 = 6.7%.
2. (7.0% − 4.0%) × 25.0m = 0.75 million.
3. Demand = 500 − 360 = 140; supply = 360 − 100 = 260; unemployment = 120 thousand.
4. Unemployment that persists after the cause has ended, because the equilibrium rate has risen.
5. Net pay = 10 × 35 × 0.90 = 315 cu; 200 ÷ 315 × 100 = 63.5%.
6. Any two of: generous benefits, strong unions or minimum wages, skills mismatch, poor information, hysteresis.
7. 240 ÷ 250 × 100 = 96.0.
8. Output beyond potential creates an inflationary gap; wages and prices rise and the gain reverses. Only supply-side change lowers the natural rate.
9. Any two of: retraining cost, lack of transferable skills, licences and entry rules, age, employer prejudice.
10. 3,000 ÷ 0.50 = 6,000 cu.

Where marks are usually lost

• Defining full employment as no unemployment.
• Drawing a wage floor below the equilibrium wage, which has no effect.
• Dividing the number out of work by the entire population instead of the labour force.
• Saying benefits cause unemployment without separating voluntary from involuntary.
• Applying demand-side policy to structural unemployment without comment.
• Listing policies with no evaluation of time lags, cost or side effects.
• Treating a fall in the rate as more jobs when people have left the labour force.
• Describing mobility factors without saying whether they affect geographical or occupational mobility.

Official syllabus

Cambridge International AS & A Level Economics 9708 syllabus for examination in 2026, 2027 and 2028, section 9.3 Employment/unemployment (Cambridge University Press & Assessment).