Inflation, unemployment and policy judgement

Pearson Edexcel International AS Economics (WEC12), specification Issue 2, June 2018. This topic covers spec section 2.3.6 in full: the six macroeconomic objectives, the four conflicts between them, supply-side policies (free market and interventionist) and demand-side policies (fiscal and monetary, with the central bank 中央银行's roles). Worked examples are original or adapted from the WEC12/01 Sample Assessment Materials and labelled SAM.

Must-know for this topic:

Governments pursue six objectives (2.3.6.1): economic GROWTH (rising real GDP); a LOW AND STABLE rate of inflation (an inflation target 通胀目标 anchors expectations); LOW unemployment (waste of resources, PPF inside); BALANCE OF PAYMENTS equilibrium on the current account (sustainability of external borrowing); a BALANCED government budget (debt sustainability over the cycle); and GREATER income equality (equity and cohesion). Each objective has a measure from topic 3 — real GDP growth, CPI inflation, the ILO unemployment rate, the current-account balance, the budget balance, and an inequality measure — and each carries a trade-off 权衡 against at least one other objective.

INFLATION versus UNEMPLOYMENT: the short-run Phillips curve 菲利普斯曲线 shows the trade-off — points (4, 8), (6, 5), (8, 3), (10, 2) trace inflation against unemployment, so cutting inflation from 8% to 3% costs unemployment rising from 4% to 8% in the short run (2.3.6.2a). GROWTH versus the ENVIRONMENT: faster output raises emissions and resource use — the SAM's India extract shows Delhi closing schools for severe smog while growth ran above 7% (2.3.6.2b). INFLATION versus the CURRENT ACCOUNT: reflation raises incomes, sucking in imports and raising prices, which worsens competitiveness — both move the current account towards deficit (2.3.6.2c). GROWTH versus EQUALITY: growth driven by skilled sectors can widen income gaps even as average incomes rise (2.3.6.2d). Judgement questions want the conflict NAMED, the mechanism EXPLAINED, and the trade-off WEIGHED — that is where the evaluation marks live.

Supply-side policy 供给侧政策 raises productivity 生产率, competition and incentives — they shift LRAS right (2.3.6.3a). FREE MARKET policies (2.3.6.3b): deregulation 放松监管 of product and labour markets (lower costs, easier entry); privatisation 私有化 (profit discipline); reduction in taxation (work and investment incentives); changing welfare payment levels (incentives to accept work); cutting bureaucracy costs for firms. INTERVENTIONIST policies (2.3.6.3c): investment in education, training and skills (productivity of labour); incentives to encourage investment (tax incentives or subsidies); infrastructure investment (reducing firms' costs); finance for business start-ups; regional policy (spreading activity to lagging regions). Strengths: market policies are cheap and quick to announce and can raise incentives; interventionist policies fix real capacity constraints. Weaknesses: market policies may worsen equality and their incentives are uncertain; interventionist policies are slow, costly, and subject to government failure 政府失灵 (information gaps, cost overruns) (2.3.6.3d).

Demand-side policy manages AD (2.3.6.4a): Fiscal policy 财政政策 uses government spending and taxation; Monetary policy 货币政策 uses interest rates, asset purchases (quantitative easing), lending criteria and reserve asset (liquidity) requirements. REFLATIONARY policy raises AD (higher G, lower T, lower interest rates, QE); DEFLATIONARY policy cuts AD (the reverse). In the AD/LRAS model a reflation with multiplier 乘数 2 — spending up 10 raises income 20 — raises output only while spare capacity 闲置产能 exists; against a vertical LRAS it mainly raises the price level 价格水平. (SAM WEC12/01 Q10, adapted) Quantitative easing 量化宽松 is the central bank's purchase of government or corporate bonds 债券: it improves the availability of loans, stimulating consumption and investment, boosting AD and the price level — Japan used it to fight deflation. (SAM Q12(a), adapted) The base rate 基准利率 is the cost of borrowing set by the central bank; India's cut from 6.5% to 6.25% (November 2016) eased borrowing costs to support demand.

The CENTRAL BANK (2.3.6.4d): implements monetary policy (setting the base rate, conducting QE); pursues an inflation target (credibility anchors expectations — the key to the Phillips trade-off easing over time); acts as banker to the government (managing its accounts and debt); and as banker to the banks — lender of last resort 最后贷款人 stopping solvent banks failing in a panic. Strengths of demand-side policy: monetary policy is quick, technical and insulated from politics; fiscal policy directly targets demand and distribution. Weaknesses: monetary policy works only through indirect channels with long and variable lags 时滞; fiscal policy is slow to legislate, crowds out private spending, and enlarges the budget deficit 预算赤字 (2.3.6.4e).

Extract. Inflation in the euro area reached 10.6% in October 2022, driven mainly by energy and food prices after Russia's invasion of Ukraine. The European Central Bank (ECB) raised its deposit rate from −0.5% in July 2022 to 4.0% by September 2023, the fastest rise in its history. By November 2023 inflation had fallen to 2.4%. Real GDP grew by only about 0.5% in 2023, but the unemployment rate stayed close to a record low of about 6.5%. Wholesale gas prices in Europe, which had risen more than tenfold from early 2021 to their peak in August 2022, fell back sharply during 2023. Many firms kept their workers despite weak sales, because skilled staff were hard to find.

Questions

• (a) Calculate the change in the ECB's deposit rate between July 2022 and September 2023, in percentage points 百分点. [2]
• (b) With the help of an AD/AS diagram, explain how a rise in interest rates can reduce inflation. [6]
• (c) Examine two reasons why unemployment in the euro area did not rise much while inflation fell. [8]
• (d) Evaluate whether higher interest rates were the main reason for the fall in euro-area inflation. [12]

Model answers

(a) $4.0 - (-0.5) = 4.5$ percentage points.

(b) A higher interest rate raises the cost of borrowing and the reward for saving. Households cut consumption, especially on goods bought with credit; firms delay investment; higher rates may also raise the euro's exchange rate 汇率, reducing net exports 净出口. AD shifts left from $AD_1$ to $AD_2$. On the AD/SRAS diagram the price level falls below where it would otherwise be and real output falls: inflation slows. The effect works with lags, often of a year or more.

(c) Falling energy costs shifted SRAS right. The extract says gas prices fell sharply in 2023. Lower costs shift SRAS to the right, which lowers the price level while raising output, so inflation fell without the usual rise in unemployment. This is the reverse of the cost-push 成本推动 shock of 2022. Labour hoarding and labour shortages. Firms kept skilled workers despite weak sales because they were hard to replace; with an ageing population, labour supply is tight. So the fall in demand showed up in lower hours and productivity rather than job losses. Evaluation: hoarding cannot last if weak demand continues; firms will cut jobs if profits fall for long.

(d) For interest rates as the main reason: the rise of 4.5 percentage points was very large and fast. It reduced credit growth and investment, and the stronger signal of a credible central bank stopped expected inflation from rising, so wage demands stayed moderate. Without the rate rises, high inflation might have spread into wages and become persistent (second-round effects).

Against: the inflation was mainly cost-push from energy and food, and the fall in gas prices removed much of the cause, whatever interest rates did. Monetary policy works with long lags of 12–24 months, so rate rises from late 2022 and 2023 could only have had part of their effect by November 2023. Unemployment stayed low, which suggests demand did not fall much, so the demand channel may have been weak.

Weighing: the timing suggests that falling energy prices explain most of the fall in headline inflation in 2023, while higher interest rates mattered more for core inflation (excluding energy and food) and for keeping expectations anchored. The two worked together: rate rises would have needed to be much larger, with far higher unemployment, if energy prices had stayed high.

Judgement: higher interest rates were not the main reason for the fall in headline inflation, but they were an important reason why inflation did not stay high once the energy shock faded. Their main contribution was to anchor expectations, which is hard to measure but explains why the fall came without a rise in unemployment.

What examiners reward: the calculation in percentage points (not per cent), a diagram used in the explanation, reasons tied to the extract's evidence with evaluation in part (c), and in part (d) a weighing of the causes that uses timing and lags, ending in a supported judgement.

• The six objectives with their measures (2.3.6.1).
• The four conflicts: Phillips curve points (4, 8) to (10, 2); growth vs environment (India smog); inflation vs current account; growth vs equality (2.3.6.2).
• Supply-side: the five free-market and five interventionist instruments; strengths and weaknesses of each family (2.3.6.3).
• Demand-side: fiscal vs monetary; reflationary vs deflationary; the four monetary instruments; QE defined with its mechanism (SAM Q10); the base rate (SAM Q12a, India 6.5 → 6.25).
• The central bank's four roles incl. lender of last resort; strengths and weaknesses of demand-side policy (2.3.6.4).

Boundary notes: essay answers follow the WEC rubric — Knowledge, Application, Analysis and Evaluation are marked separately (20-mark essays: 12 KAA + 8 evaluation, with level caps for missing diagrams or context). Supply-side versus demand-side evaluation should reference the time horizon: demand-side works in the short run, supply-side in the long run. Worked examples are original or SAM-adapted as labelled, with arithmetic re-derived.