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IB DP Economics — Unit 3: Macroeconomics | SL | 3.6 Demand Management — Fiscal Policy
📋 What You Will Learn
- Define fiscal policy, government budget, budget deficit, budget surplus, and national debt
- Identify the main categories of government revenue (direct and indirect taxes) and government expenditure (current, capital, transfer payments)
- Explain how fiscal policy operates through changes in government spending and taxation to influence aggregate demand
- Analyse the Keynesian multiplier effect and its role in amplifying fiscal policy impacts
- Evaluate the effectiveness and limitations of expansionary and contractionary fiscal policy
- Apply fiscal policy concepts to real-world economic scenarios using diagrams and data
🔍 Guiding Question To what extent can governments use their spending and taxation decisions to stabilise an economy experiencing a recession or inflationary boom?
🌍 Why This Matters In 2023, the United States federal government spent approximately $6.1 trillion while collecting only $4.4 trillion in revenue — running a deficit of $1.7 trillion. Meanwhile, the UK government announced £20 billion in additional spending in its 2024 Autumn Budget, funded partly by tax rises. Every time a government decides how much to spend and how much to tax, it is making a fiscal policy decision with direct consequences for output, employment, inflation, and inequality.
What Is Fiscal Policy?
Governments do not simply collect taxes and spend money in a neutral way. Every budget decision — whether to build a hospital, cut income tax, or increase unemployment benefits — changes the level of aggregate demand in the economy. Fiscal policy is the deliberate use of these decisions to pursue macroeconomic objectives.
📖 Definition — Fiscal Policy Fiscal policy refers to the use of government revenue (taxation) and government expenditure to influence macroeconomic variables such as real GDP, employment, the price level, and income distribution.
Fiscal policy is a form of demand-side policy — it works primarily by shifting the aggregate demand (AD) curve. When the government spends more or taxes less, AD increases. When it spends less or taxes more, AD decreases.
- Expansionary fiscal policy: increase in government spending and/or decrease in taxes → AD shifts right → used to stimulate growth during a recession
- Contractionary fiscal policy: decrease in government spending and/or increase in taxes → AD shifts left → used to reduce inflationary pressure
The Government Budget
The government budget is the annual statement of planned government revenue and expenditure. The relationship between these two determines whether the government is in surplus, deficit, or balance — and this has profound implications for the economy.
📖 Definition — Government Budget The government budget is the annual financial plan showing expected government revenue (mainly from taxation) and planned government expenditure over a fiscal year.
Budget Positions
- Balanced budget: government revenue = government expenditure — neither adding to nor withdrawing from the circular flow
- Budget surplus: government revenue > government expenditure — government is withdrawing more from the circular flow than it injects; contractionary effect
- Budget deficit: government expenditure > government revenue — government injects more than it withdraws; expansionary effect
📖 Definition — Budget Deficit A budget deficit occurs when government expenditure exceeds government revenue in a given fiscal year. It is financed by government borrowing, typically through the sale of government bonds.
📖 Definition — Budget Surplus A budget surplus occurs when government revenue exceeds government expenditure in a given fiscal year. The surplus can be used to repay existing government debt or saved in a sovereign wealth fund.
📖 Definition — National (Government) Debt The national debt (also called public debt or