How do interest rates and the money supply influence the economy, and what are the limits of monetary policy?
Monetary policy: interest rates and the transmission mechanism, the role of the central bank and inflation targeting, quantitative easing, and the strengths and weaknesses of monetary policy.
An Eduqas A520 answer to monetary policy, covering how the central bank uses interest rates and the money supply, the monetary transmission mechanism, inflation targeting and the role of an independent central bank, quantitative easing, and the strengths and weaknesses of monetary policy.
Reviewed by: AI editorial process; not yet individually human-reviewed
Have a quick question? Jump to the Q&A page
Jump to a section
What this dot point is asking
Eduqas wants you to explain how the central bank uses interest rates and the money supply, set out the monetary transmission mechanism, explain inflation targeting and the role of an independent central bank, describe quantitative easing, and evaluate the strengths and weaknesses of monetary policy. Monetary policy is the main UK tool for hitting the inflation target.
Interest rates and the central bank
The monetary transmission mechanism
Quantitative easing
Strengths and weaknesses of monetary policy
- Strengths. It is flexible (the MPC meets regularly and can change rates quickly), independent of the political cycle, and its credibility anchors inflation expectations. It affects the whole economy through several channels.
- Weaknesses. Long and variable time lags mean it can act too late; it is blunt (it cannot be targeted at particular regions or groups, and high rates hurt indebted households); it is largely ineffective against cost-push inflation (which it can only address by deepening the demand squeeze); and it loses traction at the zero lower bound or when confidence is so low that cheap credit is not taken up (a liquidity-trap-style problem).
Examples in context
- The 2022-23 tightening. The Bank of England raised rates sharply to bring double-digit inflation back toward target, accepting slower growth.
- Post-2009 QE. Hundreds of billions of pounds of bond purchases supported demand when rates hit their floor after the financial crisis.
- Independence since 1997. Operational independence is credited with anchoring UK inflation expectations around the 2 per cent target for two decades.
Try this
Q1. Explain how a cut in interest rates is intended to raise aggregate demand. [4 marks]
- Cue. Lower borrowing costs and a lower reward to saving raise consumption and investment; a weaker exchange rate raises net exports; higher asset prices raise wealth, all lifting AD.
Q2. Explain why quantitative easing is used when interest rates are very low. [4 marks]
- Cue. At the zero lower bound rates cannot be cut further, so the bank creates money to buy bonds, lowering long-term yields and raising the money supply to support demand.
Exam-style practice questions
Practice questions written in the style of WJEC Eduqas exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Eduqas Component 1 20192 marksExplain what is meant by monetary policy.Show worked answer →
A 2-mark explain question. One mark for the core idea, one for development.
Monetary policy is the use of interest rates and the money supply by the central bank (the Bank of England) to influence aggregate demand and achieve macroeconomic objectives, particularly the inflation target. Development: raising the base rate, for example, tends to reduce borrowing and spending, lowering AD and inflationary pressure.
Markers reward the reference to interest rates and the money supply and the link to the inflation target or aggregate demand.
Eduqas Component 3 (macro) 202112 marksEvaluate the effectiveness of a rise in interest rates in reducing demand-pull inflation.Show worked answer →
A levels-of-response essay. Knowledge and application: explain the transmission mechanism: a higher base rate raises borrowing costs and the return to saving, so consumption and investment fall, the exchange rate tends to rise (cutting net exports), and AD falls, easing demand-pull inflation. Draw the AD-AS diagram with a leftward AD shift.
Analysis: develop each channel of the transmission mechanism.
Evaluation: weigh the limits: long and variable time lags (up to two years for full effect), the risk of choking off growth and raising unemployment, ineffectiveness against cost-push inflation, the dampened effect when confidence is very low or rates are already near zero, and the impact on indebted households. Conclude with a supported judgement: effective against demand-pull inflation but blunt, lagged and unsuited to cost-push inflation.
Related dot points
- Fiscal policy: government spending and taxation, the budget balance and the national debt, direct and indirect and progressive and regressive taxes, automatic stabilisers, and the strengths and weaknesses of fiscal policy.
An Eduqas A520 answer to fiscal policy, covering government spending and taxation, the budget balance and the national debt, direct versus indirect and progressive versus regressive taxes, automatic stabilisers, and the strengths and weaknesses of fiscal policy in managing aggregate demand.
- Supply-side policies: market-based and interventionist supply-side policies, their effect on long-run aggregate supply and the objectives, and their costs, limits and time lags.
An Eduqas A520 answer to supply-side policies, covering the distinction between market-based and interventionist supply-side policies, how they shift long-run aggregate supply to raise potential output, their effect on the macroeconomic objectives, and their costs, limits and long time lags.
- Aggregate demand and aggregate supply: the components of aggregate demand, the determinants of short-run and long-run aggregate supply, macroeconomic equilibrium, and the effects of shifts in AD and AS.
An Eduqas A520 answer to the AD-AS model, covering the four components of aggregate demand and what shifts them, the determinants of short-run and long-run aggregate supply, macroeconomic equilibrium, and how shifts in aggregate demand and supply affect the price level and real national output.
- Inflation and deflation: the measurement of inflation using a price index, demand-pull and cost-push causes, the effects of inflation and deflation, and the distinction between inflation, disinflation and deflation.
An Eduqas A520 answer to inflation and deflation, covering the measurement of inflation through a weighted price index such as the Consumer Prices Index, demand-pull and cost-push causes, the costs of inflation and of deflation, and the difference between inflation, disinflation and deflation.
Sources & how we know this
- Eduqas A Level Economics Specification (A520) — Eduqas (2015)