Skip to content

9708 · 5.3

Monetary policy

Central banks adjust interest rates to influence aggregate demand. Lower rates reduce borrowing costs and may depreciate the currency, boosting net exports.

Need to know

What you need to know

  • Monetary policy is managed by the central bank (e.g., the Bank of England).
  • Primary objective is price stability (controlling inflation).
  • Key instruments include the policy interest rate, money supply, and exchange rate.
  • It works by influencing aggregate demand to manage economic outcomes.

Explanation

Interest rates as the policy tool

  1. Expansionary: cut rate when economy in recession.
  2. Rate ↓ → C and I ↑ → AD shifts right.
  3. Exchange rate channel: lower r → currency falls → X↑ M↓.
  4. Limits: zero lower bound, inelastic investment, lags.