6.1.2 Effects of Government Policy – Interest Rates
What Are Interest Rates? 💰
Interest rates are the cost of borrowing money, expressed as a percentage of the amount borrowed. The central bank (e.g., the Bank of England) sets the official rate that banks use to lend to each other. When the rate goes up, borrowing becomes more expensive; when it goes down, borrowing becomes cheaper.
How the Central Bank Changes Rates 🏦
- Uses open‑market operations to buy or sell government bonds.
- Adjusts the discount rate for banks borrowing directly from the central bank.
- Publishes a policy statement that signals future expectations.
Impact on Businesses 📈
| Effect |
What Happens |
Why It Matters |
| Higher Rates |
Borrowing costs rise → fewer loans for expansion. |
Reduced investment → slower growth. |
| Lower Rates |
Borrowing costs fall → more loans for expansion. |
Increased investment → faster growth. |
Impact on Consumers 🏠
| Effect |
What Happens |
Why It Matters |
| Higher Rates |
Mortgage and credit card interest rises → higher monthly payments. |
Less disposable income → lower spending. |
| Lower Rates |
Mortgage and credit card interest falls → lower monthly payments. |
More disposable income → higher spending. |
Impact on the Economy 📉📈
| Effect |
What Happens |
Why It Matters |
| Higher Rates |
Aggregate demand falls → slower GDP growth. |
Can help control inflation but may increase unemployment. |
| Lower Rates |
Aggregate demand rises → faster GDP growth. |
Can boost employment but may lead to higher inflation. |
Analogy: The Water Valve 🚰
Think of the economy as a big water tank. The central bank is the valve that controls how much water (money) flows in. If the valve is turned up (higher rates), less water flows → businesses and households get less money to spend. If the valve is turned down (lower rates), more water flows → more money is available, encouraging spending and investment. Just like a garden needs the right amount of water, the economy needs the right amount of money flow to stay healthy.
Exam Tips for 6.1.2 📚
| Tip |
Why It Helps |
| Use the Δi symbol |
Shows a change in interest rate clearly: $Δi = i_{\text{new}} - i_{\text{old}}$. |
| Link to cause and effect |
Explain how a rate change leads to a specific outcome for businesses, consumers, or the economy. |
| Use a simple table |
Organises information neatly and shows relationships at a glance. |
| Include an analogy |
Makes your answer memorable and demonstrates understanding. |