The lesson
Explain the mechanism, then qualify the outcome. Use this page as a fast, high-quality revision pass—not a wall of notes to memorise.
How monetary policy works
Central banks can influence the cost and availability of credit, most visibly through interest rates.
- Lower rates can discourage saving and reduce borrowing costs for households and firms.
- Higher rates can reduce consumption and investment, helping to restrain demand-pull inflation.
- Rate changes can affect capital flows and the exchange rate, influencing export competitiveness and imported inflation.
Why outcomes are uncertain
The policy is indirect, so its effect depends on confidence and the wider economic environment.
- Households may save rather than spend when confidence is weak.
- Firms may not invest if they expect low demand even when borrowing is cheap.
- There are time lags, and a higher rate can hurt indebted households or slow growth.
Worked exam thinking
Worked example: weak confidence
Prompt: Why might cutting interest rates have only a small effect during a recession?
How to turn knowledge into marks
Use this answer route
For a focused explanation or short evaluation question on this topic:
- 1Define the core idea precisely.
- 2Explain the chain of cause and effect.
- 3Apply it to the context in the question.
- 4Evaluate a limitation, trade-off or condition.
Quick questions
Check your understanding
What is monetary policy?
Action by a central bank to influence interest rates, credit conditions and spending in the economy.
How can higher interest rates reduce inflation?
They can reduce consumption and investment, lowering aggregate demand; they may also support the currency and reduce imported inflation.
Is monetary policy always effective?
No. Its effect depends on confidence, banking conditions, debt levels, exchange-rate movements and time lags.