OCR A Level Economics: Supply-side policy (H460)

This guide follows the OCR A Level Economics (H460) specification, Version 3.0 (June 2026), for first assessment in 2021. It covers the topic Supply side policy, in the area of study The application of policy instruments, within the Macroeconomics content (Component 02). The specification labels none of it as AS or Extension. Every country, firm and figure below is invented for illustration and is not real data. Money is in currency units (cu).

Use the OCR Economics hub, the printable checklist and the free diagnostics to plan revision. Then use the revision notes and the practice questions. The macroeconomics overview gives context. Fiscal, monetary and policy-conflict units are separate, so they appear here only as comparisons.

What the specification asks for

Outcome	You must be able to
Explain policies that raise the quality or quantity of factors of production	Explain each of the twelve measures below and say which factor it changes
Evaluate effectiveness	Judge how far supply-side measures achieve the government’s macroeconomic objectives

The twelve measures are: education and training; reforming tax and benefits; reducing marginal tax rates; National Minimum Wage legislation and promoting a living wage; labour market flexibility, including the housing market; immigration; privatisation; deregulation; trade union reform; infrastructure investment, including transport; research and development incentives; and subsidies.

The core idea

Supply-side policy aims to raise the economy’s productive capacity by improving the quality or quantity of factors of production, or by making markets work better. On an AD/AS diagram this shifts long-run aggregate supply (LRAS) to the right. Use the sketch below in answers.

Step	Effect
LRAS shifts right	Potential output rises, so the trend rate of growth can rise
Same AD	Equilibrium output higher, price level lower than before
Wider results	Lower inflationary pressure, more jobs, better competitiveness

Describe the diagram in words: “the long-run aggregate supply curve shifts right from LRAS1 to LRAS2, so equilibrium moves from price level P1 and output Y1 to P2 and Y2, with P2 below P1.”

1. Education and training

Investment in human capital raises labour productivity, so the quality of labour improves. It also helps the occupational mobility of workers, which cuts structural unemployment.

Worked example: is training worth it?

A firm in Country K (illustrative) spends 1,800 cu training one worker. Output per year rises by 450 cu for 5 years. Discount rate 4%.

Present value = 450 × the annuity factor. The annuity factor for 5 years at 4% is 4.4518.

Present value = 450 × 4.4518 = 2,003 cu. Net present value = 2,003 − 1,800 = 203 cu. The training pays for itself.

Evaluation: firms may under-train because trained workers can be poached, so the state may fund it. Benefits take years, results depend on the quality of provision, and the training must match skills employers need.

2. Reforming tax and benefits, and reducing marginal tax rates

The marginal tax rate is the share of each extra unit of income paid in tax. Lower rates raise the reward for work, which may raise labour supply and effort, and may raise the supply of entrepreneurs.

Worked example: a cut in the higher rate

Country K taxes income at 0% up to 10,000, 20% from 10,000 to 40,000, and 40% above 40,000. A worker earns 55,000.

Tax = 0.20 × 30,000 + 0.40 × 15,000 = 6,000 + 6,000 = 12,000.

If the higher rate falls to 35%, tax = 6,000 + 0.35 × 15,000 = 11,250. A 2,000 pay rise is now taxed at 35%, so the worker keeps 1,300 instead of 1,200. The marginal rate falls from 40% to 35%; the average rate falls from 21.8% to 20.5%.

Benefits and the effective marginal rate

Benefits withdrawn as earnings rise act like a tax. Suppose a worker pays 20% tax and loses 50% of net earnings in benefits. Out of an extra 100 earned: tax 20, net 80, benefit lost 40, so 40 is kept. The effective marginal rate is 60%. Cutting the taper to 35% loses 28, so 52 is kept and the rate is 48%. Reform of tax and benefits therefore aims to make work pay and reduce the unemployment trap.

Evaluation: the income effect may lead people to work less when their pay rises. Cuts cost the government revenue unless behaviour changes enough, and gains go mainly to higher earners, so inequality may widen.

3. National Minimum Wage and a living wage

A National Minimum Wage (NMW) is a legal wage floor. A living wage is a rate linked to the estimated cost of living, which the government can promote and employers can choose to pay. Both are meant to raise the incentive to work and to reduce in-work poverty, and higher pay may raise productivity through motivation and lower staff turnover.

Worked example: the elasticity decides

Country K raises the NMW from 9.00 to 9.45 cu an hour (+5%). 50,000 workers work 30 hours a week. The weekly bill is 50,000 × 30 × 9.00 = 13,500,000 cu.

Wage elasticity of demand for labour	Change in employment	Jobs	New weekly bill	Change
−0.3	−1.5%	49,250	13,962,375	+3.4%
−1.2	−6.0%	47,000	13,324,500	−1.3%

If demand is inelastic, low-paid workers gain overall. If it is elastic, the wage bill falls and jobs are lost. Evaluation: the floor may cause unemployment, may push up costs and prices, and is hard to set. A voluntary living wage avoids legal compulsion but only reaches willing employers.

4. Labour market flexibility, including the housing market

A flexible labour market lets wages, hours and workers adjust quickly. Measures include easing hiring and firing rules, encouraging part-time and flexible contracts, and improving geographical mobility. The housing market matters because high rents and a shortage of homes stop workers moving to jobs.

Worked example: why a worker does not move

A job in Region S pays 3,600 cu a year more than in Region N, but rent is 5,400 cu a year higher. Net gain = 3,600 − 5,400 = −1,800 cu, so the worker stays and the vacancy remains. If more homes are built and the rent gap falls to 2,400, the net gain is +1,200 cu and moving is worthwhile. Policies include easing planning rules, building affordable homes and ending rules that tie tenants to one area.

Evaluation: flexible contracts may increase insecurity and reduce training. Building homes takes years, and some people stay for family and community reasons.

5. Immigration

Inward migration raises the quantity of labour, and, if migrants are skilled, its quality. It can fill shortages and ease wage pressure.

Worked example: GDP and GDP per head

Country K has population 40m and GDP 1,600bn. Net inflow is 0.4m, of whom 320,000 work and each produces 38,000. Extra output = 320,000 × 38,000 = 12.16bn. New GDP = 1,612.16bn (+0.76%). New population = 40.4m. GDP per head falls from 40,000 to 39,905 (−0.24%).

Total output rises, but income per head can fall if migrants produce less than the average. Evaluation: consider tax contributions, pressure on housing and services, the “brain drain” effect on the origin country, and effects on wages of low-skilled workers.

6. Privatisation and deregulation

Privatisation is the transfer of ownership from the public to the private sector. The argument is that the profit motive and shareholder pressure raise productive efficiency; competition lowers costs and prices.

Worked reminder: a state firm’s cost per journey falls from 24 to 21 cu, a fall of 12.5%. The government sells for 3.6bn a business earning 0.24bn profit a year. Borrowing at 4% would cost 0.144bn, so the state gives up 0.096bn a year net. A one-off revenue gain may hide a long-term loss.

Evaluation: a private monopoly may exploit its power, loss-making but socially useful services may be cut, and regulation may be needed.

Deregulation removes rules that restrict entry or add costs. If a firm’s compliance costs of 2.5m make up 5% of its 50m total costs and rules are relaxed so these fall 40%, costs fall by 1.0m. At 4m units, average cost falls from 12.50 to 12.25 (−2%). Entry becomes easier and markets more contestable. Evaluation: rules often protect safety, workers and the environment, so the gain may carry external costs.

7. Trade union reform

Unions can raise wages above the market rate and cause strikes. Reform, such as limiting strike action or requiring ballots, aims to reduce labour costs and disruption and to increase flexibility. Example: union members earn 14.40 against 12.80 for similar non-members, a 12.5% premium. If 360,000 working days are lost across 2.4m employees, that is 150 days per 1,000; if reform cuts it to 96,000, the rate is 40 per 1,000.

Evaluation: unions may also raise productivity, give workers a voice and reduce turnover. Weaker unions may widen inequality and lower morale.

8. Infrastructure, research and development, and subsidies

Infrastructure investment, such as transport, raises the quantity and quality of capital and cuts firms’ costs. It may crowd in private investment.

Worked example: a transport link

A road saves 20 minutes for 12,000 journeys a day. Time is valued at 15 cu an hour, over 250 days a year. Annual benefit = 12,000 × (20/60) × 15 × 250 = 15m. At 3.5% over 30 years, present value = 15m × 18.392 = 275.9m. Cost 180m, so net present value = +95.9m and the benefit–cost ratio is 1.53.

R&D incentives, such as tax credits, cut the cost of innovation. A project costs 8m and has private return 6.5m, so a firm will not do it. A 25% credit cuts its cost to 6m, giving +0.5m. If total social benefit is 11m, spillovers are 4.5m and the credit cost of 2m is justified.

Subsidies lower costs. Demand is P = 90 − Q, supply P = 30 + 2Q, so equilibrium is Q = 20, P = 70. A subsidy of 12 per unit moves supply to P = 18 + 2Q: Q = 24, P = 66. Producers receive 78 (up 8), consumers pay 66 (down 4). Cost to the government = 12 × 24 = 288.

9. Evaluating effectiveness against macro objectives

Link each measure to objectives: growth, low inflation, low unemployment, external balance and fairness.

Judgement point	Chain of reasoning
Growth	LRAS shifts right, potential output rises. Suppose trend growth rises from 2.0% to 2.5%: after 10 years output index is 128.0 against 121.9, about 5% higher
Inflation and jobs	Lower costs ease inflation and reduce structural unemployment
Time lags	Education and infrastructure take years to work
Cost	Funding competes with other spending
Certainty	Uncertain, since effects depend on firms and households
Equity	Many measures widen income gaps unless supported by other policy
Demand	Without demand, extra capacity may stay unused

A strong answer links causes to consequences, judges which measures suit the case, and reaches a justified conclusion.

Common errors

• Showing a supply-side policy as an AD shift.
• Saying NMW always causes unemployment, without the elasticity.
• Writing “benefits increase productivity” with no mechanism.
• Ignoring costs and time lags.

Official syllabus

OCR, A Level in Economics (H460), specification Version 3.0 (June 2026), for first assessment in 2021: Macroeconomics, The application of policy instruments, topic Supply side policy.