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Common exam mistakes on 2281 Monetary policy. Learn what loses marks, then practise the topic with Examiner’s Ink.
In your exam answers, always use an AD/AS diagram to illustrate the effects of monetary policy. Clearly label your axes (Price Level, Real GDP), the initial and new AD curves, and the resulting changes in equilibrium price level and output. Explicitly state which components of AD (C, I, G, or X-M) are affected by the policy change and explain the transmission mechanism.
Always distinguish nominal and real interest rates in inflation contexts. Examiners reward explicit transmission chains: rate → C/I → AD → P and Y.
No, it is not guaranteed. While lower interest rates are designed to stimulate borrowing and spending, their effectiveness can be limited. If consumer and business confidence is very low (e.g., during a deep recession), they may choose to save more or pay down debt rather than take on new loans, a situation known as a 'liquidity trap'. Furthermore, commercial banks may not pass on the full rate cut to customers if they are trying to repair their own financial health. Therefore, the impact on aggregate demand can be weaker than expected.
Monetary policy is controlled by the central bank and involves managing interest rates and the money supply. Its primary tool is the policy interest rate. Fiscal policy, on the other hand, is controlled by the government and involves changes in government spending and taxation. While both policies aim to manage aggregate demand, they are implemented by different bodies and use different instruments.
The effects of monetary policy are subject to significant time lags. After the central bank changes the policy rate, it takes time for commercial banks to adjust their rates. It then takes more time for firms and households to react to these new rates by changing their spending and investment plans. These decisions then take time to filter through to affect total demand, and finally, for changes in demand to impact wages and prices across the economy. This entire transmission mechanism can take up to two years to have its full effect on the inflation rate.