Model essay (b): are supply-side policies best?

What this lesson teaches

• I can explain why governments use policy to raise living standards.

  Syllabus 9570, 3.2.3(a). Macroeconomic Policies: Macroeconomic policy decisions undertaken by governments to achieve macroeconomic objectives in relation to living standards

• I can explain fiscal, monetary and supply-side policy and judge how well each works.

  Syllabus 9570, 3.2.3(b). Macroeconomic Policies: Policy measures and their effectiveness in achieving macroeconomic objectives:; Fiscal policy - How discretionary fiscal policy can influence the level of economic activities and living standards through government spending and taxation; Monetary policy - How monetary policy can influence the level of economic activities and living standards through the management of exchange rates (case of Singapore) and interest rates; Supply-side policies - How supply-side policies can improve quantity, quality and mobility of factors of production to increase the productive capacity of an economy and hence affect living standards

Make a guess

Which ending earns evaluation marks in an essay on supply-side policies and inflation?

1. Most inflation here is imported, so supply-side policies help but cannot do it alone.
2. It depends on many factors, so the answer could go either way.
3. Supply-side policies are good and bad, so the government should think carefully before using them.

The answer to part (b)

Introduction

Supply-side policies aim to raise the economy's productive capacity by improving the quantity and quality of its factors of production. Examples are training, grants that help firms adopt technology, and infrastructure. In the long run, inflation stays low when total spending grows no faster than capacity. This essay argues that supply-side policies are necessary for Singapore but not enough on their own. The best approach depends on where inflation comes from, how quickly a policy works and how open Singapore is.

Paragraph 2: they raise the economy's speed limit

Supply-side policies suit the long run because they raise how fast the economy can grow without inflation. Take training under SkillsFuture. When workers learn new skills, output per worker (productivity) rises. Firms can then pay higher wages without raising their cost per unit of output, so they have less reason to raise prices. Grants that help firms automate work the same way. In Figure 2, productive capacity rises and AS shifts right from AS0 to AS1. With AD unchanged, the economy moves from E0 to E1: real output rises from Y0 to Y1 and the price level falls from P0 to P1. In reality AD grows every year, so the lesson is that growth can continue without inflation.

Paragraph 3: they target Singapore's own cost pressures

Supply-side policies also target the main home-grown cause of inflation in Singapore. Singapore has a small, ageing workforce and very little land. When the economy grows, firms compete for scarce workers and space, so wages and rents rise faster than productivity. This happened when the labour market was tight in 2022. Fiscal or exchange rate policy could ease this only by slowing the whole economy. Supply-side policies remove the bottleneck instead. Better public transport and new industrial land lower firms' costs, and retraining helps workers move from shrinking to growing industries. So they cut cost-push pressure without giving up growth and jobs.

Paragraph 4: they cannot stop imported inflation

However, supply-side policies cannot deal with imported inflation, a large source of price rises in Singapore. Singapore imports nearly all its energy and over 90% of its food. When world oil or food prices jump, as they did in 2022, firms' costs rise whatever the skills of Singapore's workers. Training does not make imported wheat cheaper. Exchange rate policy does. When MAS lets the S$ appreciate faster, import prices in S$ fall within months, so costs and consumer prices rise less. Since Singapore's total trade is more than three times its GDP, this channel is powerful. For imported inflation, the exchange rate is the better tool.

Paragraph 5: they are slow and uncertain

Supply-side policies are also slow and uncertain. Training takes months and new infrastructure takes years, so they cannot stop a sudden rise in prices. Their success also depends on firms and workers. Workers may not finish courses, or may learn skills that firms do not need, and firms may buy machines that sit unused. Meanwhile the government pays for these programmes now, while the gains come later and are hard to measure. If inflation comes from AD growing too fast in a boom, the quicker fix is to cool demand through a stronger S$ or a tighter budget.

Paragraph 6: evaluation

Which policy is best depends first on the cause of inflation. Imported inflation is best met with exchange rate policy. Demand-pull inflation can be met with exchange rate or fiscal policy. Home-grown cost-push inflation from labour and land shortages needs supply-side policies. It depends second on the time frame. The exchange rate works within months, while supply-side policies work over years. The question asks about the long run. Over the long run, Singapore's limited labour and land are the main limit on growth, so only supply-side policies let the economy keep growing without recurring inflation. Even so, they cannot protect Singapore from world price shocks, so the exchange rate remains essential.

Conclusion

Supply-side policies are the best way to tackle the home-grown, long-run causes of inflation in Singapore. But they are not the best single way to keep inflation low. A small open economy also needs exchange rate policy to offset imported inflation. The best approach is a mix: the exchange rate for price stability year to year, and supply-side policies so that capacity keeps up with demand.

Margin notes: how each paragraph scores

Introduction

Defines the policy, states a clear stand and names the criteria the evaluation will use (cause, time frame, openness). Examiners reward a stand that is set up early and kept to the end.

Paragraph 2

L3 analysis: a full chain from training to productivity to unit costs to prices, then Figure 2 with every label used. The last line shows the student knows the diagram is a simplification.

Paragraph 3

Applies the argument to Singapore's features: a small workforce and little land. Context used as part of the reasoning is what separates L3 from L2.

Paragraph 4

A counter-argument with the same depth as the thesis. This is the two-sided analysis a 15-mark 'discuss' needs for L3. It compares with an alternative policy, which sets up the evaluation.

Paragraph 5

A second limitation: time lags and uncertain results. Each claim is explained, not just listed.

Paragraph 6

E3: two well-explained judgements, one on the cause of inflation and one on the time frame. Each is tied back to 'long run' and 'Singapore' in the question. It weighs; it does not summarise.

Conclusion

An overall judgement that answers 'whether ... the best way' directly. E3 descriptors ask for this summative conclusion.

Overall: L3 and E3, 13 to 15 marks

Without paragraphs 4 and 5 the analysis is one-sided and stays at L2 (5 to 7). If paragraph 6 only said 'it depends on many factors', evaluation would fall to E1.

Worked example: A 4-minute plan

A 15-mark plan fixes the stand and the criteria before any analysis is written.

1. Stand: necessary but not enough alone. Criteria: the cause, the time frame, Singapore's openness.
2. For: AS shifts right (Figure 2); targets labour and land shortages.
3. Against: cannot stop imported inflation (the exchange rate is better); slow and uncertain.
4. Judge: depends on the cause and the time frame; best as a mix with exchange rate policy.

Watch out for this

Evaluation means adding 'it depends' in the last paragraph.

'It depends' earns little unless you say what it depends on and why, using the question's context. Each judgement should weigh one side against the other.

Check your understanding

Which sentence earns analysis marks, but not evaluation marks, in part (b)?

1. SkillsFuture raises productivity, which shifts AS right and eases price pressure.
2. There are many factors to consider, so the answer depends on many different things.
3. Since much of Singapore's inflation is imported, supply-side policies help but are not enough.