Demand Side Policies

Fiscal policy.

• DECISION MAKER: government (Treasury / Ministry of Finance).
• TOOLS: taxation, government spending.
• VISIBLE: budget announcements, tax changes.

Monetary policy.

• DECISION MAKER: central bank (Bank of England, Federal Reserve, ECB).
• TOOLS: interest rates, money supply (open-market operations, reserve requirements, quantitative easing).
• LESS VISIBLE: rate decisions are made by committee, often less politically charged.

Why separate decision-makers?

Many economies separate fiscal and monetary policy because they fear governments would be tempted to keep interest rates artificially low for political popularity (boosting growth before elections). Independent central banks insulate monetary policy from short-term politics.

Cambridge tip. Mark schemes consistently penalise candidates who confuse fiscal with monetary. Memorise the table:

	Fiscal	Monetary
Decision-maker	Government	Central bank
Tools	Tax + spending	Interest rates + money supply
Direct effect on	Disposable income, demand	Cost of borrowing, money in circulation

Expansionary policy aims to RAISE aggregate demand. Used in recession or to boost slow growth.

Expansionary fiscal policy:

• Cut taxes. Households have more disposable income → consumer spending up. Firms have more profit → investment up.
• Increase government spending. Direct injection of demand. Multiplier effect amplifies the impact (one round of spending creates income that becomes the next round of spending).

Expansionary monetary policy:

• Lower interest rates. Cheaper to borrow → consumer spending and firm investment up. Cheaper savings → less incentive to save → more spending.
• Quantitative easing (QE). Central bank buys government bonds, injecting money into the economy. Used when interest rates are already near zero.

Mechanisms — how does it work?

Tool	Direct effect	Indirect effect
Tax cut	Higher disposable income	More spending → AD rises
Spending rise	Direct AD injection	Multiplier effect
Rate cut	Cheaper borrowing	More C + I → AD rises
QE	More money in system	Lower long-term rates

Limitations of expansionary policy:

1. Budget deficit (fiscal). Tax cuts + spending increases widen the deficit. Government must borrow → debt accumulates.

2. Inflation. If the economy is near full capacity, expansionary policy doesn't raise output — it raises prices. Inflation results.

3. Time lags. Fiscal policy especially takes months to design and implement. By the time it takes effect, the recession may be over.

4. Crowding out. Higher government borrowing can raise interest rates, reducing private investment.

5. Zero-lower-bound (monetary). Interest rates can't go much below zero. In severe recessions, monetary policy may run out of room.

Cambridge tip. Top-band answers always include LIMITATIONS. The 8-mark question often has the structure: 'explain expansionary policy + 2 limitations'.

Contractionary policy aims to REDUCE aggregate demand. Used when inflation is high.

Contractionary fiscal policy:

• Raise taxes. Lower disposable income → less spending.
• Cut government spending. Direct reduction of AD.

Contractionary monetary policy:

• Raise interest rates. Borrowing more expensive → less spending and investment. Saving more attractive.
• Reduce money supply (sell bonds, raise reserve requirements). Less money in circulation.

Recent example. 2022-2024 inflation surge (post-pandemic + energy crisis): central banks worldwide raised interest rates sharply (Bank of England 0.1% → 5.25%, Fed 0% → 5.5%) to bring inflation back to target.

Trade-offs:

• Slower growth. Higher rates / less spending = slower output.
• Higher unemployment (Phillips trade-off).
• Strain on borrowers (mortgage holders, indebted firms).

Limitations:

• Time lag. May take 12-18 months for monetary policy to fully affect prices.
• Political cost. Tax rises and spending cuts are unpopular.
• Recession risk. Over-tightening can tip the economy into recession.

Cambridge tip. Mark schemes recognise REAL-WORLD examples (e.g., the 2022-2024 rate hikes). Cite a specific country or central bank where possible.