DP Economics HL 3.5 Demand Management: Fiscal Policy

DP Economics HL 3.5 Demand Management: Fiscal Policy - Full notes

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DP Economics HL | 3.5 Demand Management: Fiscal Policy

DP ECONOMICS · UNIT 3: MACROECONOMICS

3.5

Demand Management: Fiscal Policy

Full notes for HL · IB-style

Contents

1	Government revenue and expenditure
2	The government budget: deficits, surpluses and debt
3	Fiscal policy and aggregate demand
4	Automatic stabilizers and discretionary policy
5	Fiscal policy and long-term growth
6	Strengths and limitations of fiscal policy
7	The multiplier and fiscal policy (HL only)
8	Sources of government revenue
9	Types of government expenditure
10	The government budget
11	Expansionary fiscal policy
12	Contractionary fiscal policy
13	Automatic stabilizers
14	Discretionary fiscal policy
15	Fiscal policy and long-term growth
16	Evaluating fiscal policy
17	The multiplier and fiscal policy (HL)
18	Public debt
19	Mixed review: worked problems
20	Additional exam-style practice
21	Fiscal rules
22	Fiscal policy and equity
23	Case study: stimulus after 2008
24	Common misconceptions and links
25	Exam-style question with markscheme
26	Check your understanding
27	Summary and topic map

These are full teaching notes. Read each section in order, try the Think about it question before you read on, and do every Quick check before moving to the next section.

Before you start

Rate yourself on each statement now, and again after you've worked through the notes. Shade R (not yet), A (getting there) or G (confident).

I can…	R	A	G
identify the sources of government revenue and types of government expenditure
distinguish budget deficits, surpluses and government debt
explain expansionary and contractionary fiscal policy using AD/AS
explain automatic stabilizers and discretionary fiscal policy
explain how fiscal policy can influence potential output
evaluate fiscal policy: time lags, crowding out, debt, political constraints
explain and calculate the effect of the multiplier on fiscal policy

Section 7 (the multiplier and fiscal policy) is Additional Higher Level content. Every other section is common to SL and HL.

Guiding questions

How can a government pull an economy out of recession? Why did governments borrow so much in 2020? Is government debt always a problem?

How this topic is examined

Fiscal policy is a core essay topic: expect Paper 1 questions asking you to explain how fiscal policy can close a deflationary gap and to evaluate its effectiveness compared with monetary or supply-side policy.

Paper 2 texts often contain budget and debt data. Strong answers use the correct AD/AS model, name specific tools, and evaluate with time lags, crowding out and sustainability of debt. Paper 3 includes multiplier calculations.

Command term	What the examiner wants
Define	the precise meaning, ideally in the IB wording, in one or two sentences
Draw / Sketch	a fully labelled diagram with every axis, curve, equilibrium and change labelled
Explain	a causal chain linked to economic theory, usually supported by a diagram
Analyse	break a situation into its parts and trace the effects of each
Evaluate / Discuss	weigh up arguments, question assumptions and reach a justified conclusion using real-world examples
Calculate	calculate the multiplier and the change in national income, showing each step

How to use these notes

Each section teaches one part of the syllabus in full. You'll see these boxes throughout; each has one job:

Box	What it's for
Think about it	a question to get you thinking before a section; the answer comes in the section
Key point	the one idea you must not forget
Common mistake	an error examiners see every year, and how to avoid it
In the real world	where the economics shows up outside the classroom
Try this	something quick you can do yourself to test the idea
Worked example	full solutions with IB-style marks (M1 method, A1 answer, R1 reasoning)
Quick check	short questions to test yourself at the end of each section

1 Government revenue and expenditure

To understand fiscal policy, first see where the money comes from and where it goes.

Think about it

In your country, what do you think is the government's single largest source of revenue, and its single largest item of spending?

Fiscal policy is the use of government spending and taxation to influence the level of economic activity, especially aggregate demand. It is set by the government (the finance ministry), usually through an annual budget.

Governments raise revenue mainly through taxation. Direct taxes are taxes on income and wealth, paid directly to the government by the person or firm on whom they fall: personal income tax, corporate (profits) tax, property and inheritance taxes. Indirect taxes are taxes on spending: VAT or GST, excise duties on fuel, alcohol and tobacco, and tariffs. Governments also earn revenue from state-owned enterprises, from selling state assets (privatization), and they can borrow.

Government expenditure falls into three groups. Current expenditure is spending on day-to-day items: salaries of teachers, doctors and civil servants, medicines, maintenance. Capital expenditure is investment in long-lasting assets: roads, schools, hospitals, ports. Transfer payments are payments from government to individuals with no goods or services in return: pensions, unemployment benefits, child benefits. Transfer payments are not part of G in AD, because they are not spending on output, but they affect consumption.

Revenue	Expenditure
direct taxes (income, corporate, property)	current spending (salaries, supplies)
indirect taxes (VAT/GST, excise, tariffs)	capital spending (infrastructure)
state-owned enterprises; asset sales	transfer payments (pensions, benefits)
borrowing	interest on government debt

Quick check

1. Define fiscal policy.

2. Distinguish direct and indirect taxes.

3. Why are transfer payments not part of G in AD?

Answers: 1. use of government spending and taxation to influence the economy 2. direct: on income and wealth; indirect: on spending 3. they are not payments for goods or services

2 The government budget: deficits, surpluses and debt

A deficit is a yearly flow; debt is the accumulated stock.

The budget compares government revenue with government spending over a year. If spending exceeds revenue, there is a budget deficit, which must be financed by borrowing (selling government bonds). If revenue exceeds spending, there is a budget surplus. If they are equal, the budget is balanced.

Government (public) debt is the total accumulated amount the government owes from past borrowing. Each year's deficit adds to the debt; a surplus can be used to reduce it. Debt is usually expressed as a percentage of GDP, because what matters is the size of the debt relative to the economy's ability to service it.

Figure 1. A country's budget balance and government debt as percentages of GDP.

WORKED EXAMPLE 1 Deficit and debt

A government's revenue is $480 bn and spending is $540 bn; GDP is $2 000 bn and existing debt is $1 100 bn. Calculate the deficit as a percentage of GDP and the new debt-to-GDP ratio (assume GDP is unchanged).

Solution

Deficit = 540 − 480 = $60 bn = 3% of GDPA1

New debt = 1 100 + 60 = $1 160 bnM1

Debt-to-GDP = 1 160 ÷ 2 000 × 100 = 58%A1

Common mistake

Saying 'the government reduced its debt' when it only reduced its deficit. A smaller deficit still adds to debt; debt falls only with a surplus (or faster GDP growth in the ratio).

Quick check

1. What is a budget deficit?

2. How is a deficit financed?

3. What is the difference between a deficit and debt?

Answers: 1. spending exceeds revenue in a year 2. borrowing (selling government bonds) 3. deficit is a yearly flow; debt is the accumulated stock

3 Fiscal policy and aggregate demand

Spend more or tax less to raise AD; spend less or tax more to reduce it.

Expansionary (loose) fiscal policy involves increasing government spending and/or cutting taxes. Higher G raises AD directly. Lower income taxes raise disposable income and consumption; lower corporate taxes can raise investment. AD shifts right. Expansionary policy is used to close a deflationary (recessionary) gap: to raise output and reduce cyclical unemployment.

Contractionary (tight) fiscal policy involves reducing government spending and/or raising taxes. AD shifts left. It is used to close an inflationary gap: to reduce demand-pull inflation. It may also be used to reduce a budget deficit.

Figure 2. Expansionary fiscal policy in the Keynesian model: with spare capacity, AD shifts right and real output rises with little effect on the price level.

The effect depends on where the economy is. In the Keynesian model, if there is a large deflationary gap with lots of spare capacity, an increase in AD raises output and employment with little inflation. As the economy approaches full employment, more of the effect falls on prices. In the neoclassical model, expansionary policy raises output only in the short run; in the long run the economy returns to Yf with a higher price level.

	Expansionary	Contractionary
Tools	raise G, cut taxes	cut G, raise taxes
Effect on AD	shifts right	shifts left
Used to	close a deflationary gap, reduce unemployment	close an inflationary gap, reduce inflation
Effect on budget	deficit rises	deficit falls

Quick check

1. Name two expansionary fiscal measures.

2. When is contractionary fiscal policy used?

3. Why does expansionary policy cause little inflation in a deep recession?

Answers: 1. raise G, cut taxes 2. to reduce inflation / close an inflationary gap 3. spare capacity: output can rise without pushing up prices

4 Automatic stabilizers and discretionary policy

Some fiscal policy happens without anyone deciding it.

Automatic stabilizers are features of the tax and spending system that automatically reduce fluctuations in AD, without any new government decision. In a recession, incomes fall, so progressive income tax revenue falls faster than income, and more people claim unemployment benefits. Disposable income falls by less than it otherwise would, so consumption and AD fall by less. In a boom, tax revenue rises and benefit spending falls, restraining AD.

Discretionary fiscal policy is a deliberate change in spending or tax rates made by the government, such as a stimulus package or a temporary tax cut. It can be larger and better targeted than automatic stabilizers, but it is subject to time lags and political decisions.

Figure 3. How automatic stabilizers work in a recession.

In the real world

In 2020 governments combined both. Automatic stabilizers pushed up benefit spending as unemployment rose, and discretionary measures, such as wage-subsidy schemes in the UK and Europe and stimulus cheques in the US, added trillions of dollars of support.

Quick check

1. Define automatic stabilizers.

2. Give an example of discretionary fiscal policy.

Answers: 1. tax and spending changes that happen automatically with the cycle 2. a stimulus package / temporary tax cut

5 Fiscal policy and long-term growth

Some government spending raises potential output as well as demand.

Fiscal policy is mainly a demand-side tool, but it also affects the supply side. Capital spending on infrastructure (roads, ports, broadband) lowers costs for firms and raises productivity. Spending on education and health improves human capital. Tax incentives can encourage investment, research and development, and work. All of these can shift LRAS to the right, increasing potential output.

This is why governments often protect capital spending even when cutting deficits, and why the composition of spending matters as much as its size.

Figure 4. Spending on infrastructure and education can raise potential output, shifting LRAS right.

6 Strengths and limitations of fiscal policy

Powerful in deep recessions, but slow, political and limited by debt.

Strengths	Limitations
directly injects spending into the economy	time lags: recognizing the problem, passing a budget, implementing projects
effective in deep recessions when monetary policy is weak (low interest rates)	crowding out: government borrowing may raise interest rates and reduce private investment
can target specific sectors, regions or groups	political pressures: spending is easy to raise, hard to cut; election-driven decisions
capital spending also raises potential output	rising debt: interest costs and limits on future borrowing
automatic stabilizers work without decisions	less effective near full employment: mainly raises prices

Crowding out deserves explanation. When the government borrows heavily, it competes with private firms for loanable funds. This can push up interest rates, which discourages private investment and consumption. Part of the rise in G is then offset by a fall in I and C. Crowding out is most likely when the economy is near full employment; in a deep recession, when private demand for borrowing is weak and interest rates are low, it is much less likely.

Debt sustainability. If debt grows faster than GDP for long periods, interest payments take a growing share of the budget, and investors may demand higher interest rates. A government with debt in its own currency and an independent central bank has more room than one borrowing in foreign currency.

Key point

Fiscal policy is most effective in a deep recession with spare capacity and low interest rates; it is least effective near full employment, where it mainly raises prices and may crowd out private investment.

Quick check

1. What is crowding out?

2. Name two time lags in fiscal policy.

3. Why is fiscal policy less effective near full employment?

Answers: 1. government borrowing raises interest rates, reducing private investment 2. recognition, decision, implementation, impact 3. extra demand mainly raises prices

7 The multiplier and fiscal policy (HL only)

An increase in G raises national income by more than the initial spending.

HL only

This section is Additional Higher Level content. SL students do not need it.

Because of the multiplier effect (3.2), an increase in government spending raises national income by more than the initial injection. Each dollar spent becomes income for someone, who spends part of it, and so on. The multiplier is:

k = 1 ÷ (MPS + MPT + MPM) ΔY = k × ΔG

WORKED EXAMPLE 2 Fiscal multiplier

A government increases spending by $20 bn. MPS = 0.1, MPT = 0.2 and MPM = 0.1. Calculate the multiplier and the final change in national income.

Solution

Leakages = 0.1 + 0.2 + 0.1 = 0.4M1

k = 1 ÷ 0.4 = 2.5A1

ΔY = 2.5 × 20 = $50 bnA1

WORKED EXAMPLE 3 Closing a deflationary gap

Real GDP is $800 bn and full-employment output is $850 bn. The multiplier is 2.5. How much should government spending increase to close the gap?

Solution

Gap = 850 − 800 = $50 bnA1

Required ΔG = 50 ÷ 2.5 = $20 bnM1 A1

Tax cuts have a smaller multiplier effect than equal increases in spending, because part of a tax cut is saved or spent on imports before it enters the circular flow. The multiplier is smaller in open economies with high taxes and imports, and when crowding out raises interest rates. It is largest in a deep recession, when unused resources allow output to rise without inflation.

Quick check

1. MPS 0.2, MPT 0.25, MPM 0.05. Calculate k.

2. Why is a tax-cut multiplier smaller than a spending multiplier?

Answers: 1. 2 2. part of the tax cut is saved or spent on imports before the first round

8 Sources of government revenue

Taxes and more.

Governments raise revenue from direct taxes (income tax, corporation tax), indirect taxes (VAT, excise duties), sale of goods and services (state-owned enterprises), sale of assets (privatization) and borrowing.

Quick check

1. Distinguish direct and indirect taxes.

Answers: 1. direct: on income/wealth paid directly to government; indirect: on spending, collected via sellers

9 Types of government expenditure

Current, capital, transfers.

Current expenditure covers day-to-day spending (wages of public employees, supplies); capital expenditure covers long-term investment (roads, hospitals); transfer payments redistribute income (pensions, benefits) and are not part of G in AD.

WORKED EXAMPLE 4 Classifying (standard)

Classify: teachers' salaries; building a new school; unemployment benefits.

Solution

current; capitalA1

transfer paymentA1

10 The government budget

Deficit, surplus, balanced.

A budget deficit occurs when government spending exceeds revenue in a year; a surplus when revenue exceeds spending. Deficits add to public (government) debt, the total accumulated borrowing.

WORKED EXAMPLE 5 Deficit (standard)

Revenue is $820 bn and spending $910 bn. Calculate the deficit and express it as a % of GDP ($3000 bn).

Solution

Deficit = $90 bnA1

= 3% of GDPA1

Quick check

1. Distinguish the budget deficit from the public debt.

Answers: 1. deficit is a yearly flow; debt is the accumulated stock

11 Expansionary fiscal policy

Boosting AD.

In a recession, the government increases spending and/or cuts taxes to raise AD, output and employment. The effect is larger when there is spare capacity (Keynesian horizontal section).

Figure 5. Expansionary fiscal policy shifts AD right.

WORKED EXAMPLE 6 Recession (exam level)

Explain how expansionary fiscal policy reduces cyclical unemployment.

Solution

Higher G or lower taxes increase ADR1

Firms increase output and hire more workersR1

12 Contractionary fiscal policy

Cooling the economy.

To reduce inflationary pressure or a large deficit, the government cuts spending and/or raises taxes, reducing AD. It may slow growth and raise unemployment.

Quick check

1. Give one risk of contractionary fiscal policy.

Answers: 1. may cause a recession and higher unemployment

13 Automatic stabilizers

Policy without decisions.

Automatic stabilizers change without new government decisions: in a recession, tax revenue falls and benefit spending rises, cushioning the fall in AD; in a boom, the opposite happens.

WORKED EXAMPLE 7 Stabilizers (standard)

Explain how progressive income tax acts as an automatic stabilizer.

Solution

In a recession, incomes fall and tax paid falls more than proportionallyR1

Disposable income falls less, supporting consumptionR1

14 Discretionary fiscal policy

Deliberate decisions.

Discretionary fiscal policy involves deliberate changes in spending or tax rates, such as stimulus packages. It can be targeted but suffers from time lags (recognition, decision, implementation).

In the real world

During the COVID-19 pandemic, many governments introduced large discretionary programmes, such as wage subsidy (furlough) schemes, to support incomes and jobs.

Quick check

1. Name two time lags affecting fiscal policy.

Answers: 1. decision lag; implementation lag

15 Fiscal policy and long-term growth

Supply-side effects.

Government spending on education, health, infrastructure and research raises the productive capacity of the economy (LRAS). Tax incentives for investment and R&D also support long-term growth.

Quick check

1. Explain how spending on infrastructure can affect both AD and LRAS.

Answers: 1. increases G (AD) now; improves productivity and capacity (LRAS) later

16 Evaluating fiscal policy

Strengths and limitations.

Strengths: effective in deep recessions, can target sectors and regions, automatic stabilizers work quickly. Limitations: time lags, political constraints, crowding out, public debt concerns, and Ricardian equivalence (people may save tax cuts expecting future tax rises).

WORKED EXAMPLE 8 Crowding out (exam level)

Explain crowding out.

Solution

Government borrowing raises demand for loanable funds and interest ratesR1

Higher rates reduce private investment, offsetting the rise in GR1

17 The multiplier and fiscal policy (HL)

Bigger effects.

Fiscal policy is more effective when the multiplier is large (low leakages: low MPS, MPT and MPM). With multiplier k, a change in G of ΔG changes national income by kΔG.

WORKED EXAMPLE 9 Multiplier (exam level)

MPC = 0.75. Government spending rises by $20 bn. Calculate the change in real GDP.

Solution

k = 1/(1 − 0.75) = 4M1 A1

ΔY = $80 bnA1

18 Public debt

Sustainability.

Public debt is sustainable if it can be serviced without excessive tax rises or default. Key indicators: debt-to-GDP ratio, interest costs, growth rate relative to interest rate. High debt may raise interest rates and limit future policy space.

WORKED EXAMPLE 10 Debt ratio (standard)

Debt is $2.4 trillion and GDP is $3.0 trillion. Calculate the debt-to-GDP ratio.

Solution

2.4/3.0 × 100M1

= 80%A1

19 Mixed review: worked problems

Bringing the ideas together.

WORKED EXAMPLE 11 Mixed problem (exam level)

Explain why fiscal policy may be more effective than monetary policy in a deep recession.

Solution

Interest rates may already be near zero (monetary policy limited)R1

Government spending directly raises AD; can target sectorsR1

20 Additional exam-style practice

Paper 1 and Paper 2.

WORKED EXAMPLE 12 Paper 1 part (b) (exam level)

Using real-world examples, evaluate the effectiveness of fiscal policy in reducing unemployment. [15]

Solution

Expansionary fiscal policy explained with AD/AS diagramR1 R1

Examples (COVID-19 stimulus)R1

Limitations: lags, debt, crowding out; judgementR1 R1

21 Fiscal rules

Constraining governments.

Many countries adopt fiscal rules: limits on deficits (EU: 3% of GDP) or debt (60% of GDP), or balancing the budget over the cycle. Rules build credibility but may restrict responses to crises.

Quick check

1. Give one advantage and one disadvantage of fiscal rules.

Answers: 1. credibility and discipline; may prevent needed stimulus

22 Fiscal policy and equity

Redistribution.

Fiscal policy redistributes income through progressive taxes, transfers and public services. Changes in tax and spending affect different groups differently, so equity is part of evaluating fiscal policy.

Quick check

1. How might cutting top income tax rates affect equity?

Answers: 1. benefits high earners most; may increase inequality

23 Case study: stimulus after 2008

Different responses.

After the 2008 crisis, many countries used fiscal stimulus (US ARRA 2009, China's large infrastructure package). Later, some European countries adopted austerity to reduce deficits, which was associated with slower recoveries.

Quick check

1. What is austerity?

Answers: 1. cuts in government spending and/or tax rises to reduce deficits

24 Common misconceptions and links

Students often think…	Actually…
a lower deficit means lower debt	debt still rises if there is any deficit
transfer payments are part of G in AD	they affect consumption, not G
fiscal policy always raises output	near full employment it mainly raises prices
crowding out always happens	it is unlikely in a deep recession with low interest rates

How 3.5 connects to the rest of the course

Topic	Connection
3.2 AD/AS	fiscal policy shifts AD
3.3 Objectives	unemployment, inflation and debt
3.6 Monetary policy	the other demand-side tool
3.7 Supply-side policies	capital spending and tax incentives
3.4 Inequality	taxes and transfers redistribute income

25 Exam-style question with markscheme

Try this under exam conditions (about 18 minutes) before reading the markscheme.

Figure 6. Budget balance and government debt.

Text A. In 2020 the government introduced a large support package as the economy contracted. The deficit has since narrowed, but debt remains above 70% of GDP and interest payments are rising.

(a) Identify the year of the largest deficit. [1]

(b) Explain why the deficit increased in 2020. [3]

(d) Explain one risk of a high debt-to-GDP ratio. [3]

(e) Government spending rises by $40 bn. The multiplier is 2.5. Calculate the increase in national income. [2]

Markscheme

Part	Answer	Marks
(a)	2020 (−11.2% of GDP)	A1
(b)	recession reduced tax revenue (automatic stabilizers)	R1
	benefit spending rose	R1
	discretionary support packages	R1
(c)	deficits still add to debt	R1
	debt is a stock, the deficit a flow	R1
	debt ratio also depends on GDP growth	R1
(d)	higher interest payments	R1
	opportunity cost of other spending	R1
	less room for future stimulus / higher borrowing costs	R1
(e)	2.5 × 40	M1
	= $100 bn	A1

Examiner's comments. In (b), the best answers separated automatic stabilizers from discretionary measures. In (c), many candidates confused the deficit with the debt.

26 Check your understanding

Section A: multiple choice

1. Fiscal policy involves changes in

A. government spending and taxation B. interest rates C. the money supply D. exchange rates

2. A budget deficit occurs when

A. revenue exceeds spending B. debt is repaid C. government spending exceeds revenue in a year D. exports exceed imports

3. Expansionary fiscal policy includes

A. raising interest rates B. cutting taxes or raising government spending C. raising taxes D. cutting spending

4. Automatic stabilizers

A. require new laws B. raise taxes in recessions C. increase inflation in recessions D. reduce fluctuations without new decisions

5. Crowding out occurs when

A. government spending raises exports B. government borrowing reduces private investment C. taxes fall D. the central bank prints money

6. Which is a direct tax?

A. income tax B. VAT C. excise duty on fuel D. a tariff

7. Capital expenditure includes

A. teachers' salaries B. pensions C. unemployment benefits D. building new hospitals and roads

8. Government debt is

A. this year's deficit B. foreign debt only C. the total accumulated borrowing of the government D. the trade deficit

9. Government spending rises by $50 bn with a multiplier of 2.5. GDP rises by

A. $20 bn B. $50 bn C. $52.5 bn D. $125 bn

Section B: structured

10. Using a diagram, explain how expansionary fiscal policy can close a deflationary gap. [6]

11. Explain how automatic stabilizers reduce the size of a recession. [4]

12. Evaluate the effectiveness of fiscal policy in a recession. [8]

Answers

1. A 2. C 3. B 4. D 5. B 6. A 7. D 8. C 9. D

10. Raise G / cut T; AD shifts right; Keynesian spare capacity: output rises with little inflation; diagram.

11. Tax revenue falls and benefits rise automatically; disposable income supported; smaller fall in AD.

12. Direct injection, automatic stabilizers, targeting; time lags, crowding out, debt, politics; depends on spare capacity and interest rates; judgement.

27 Summary and topic map

Idea	Remember
Revenue	direct and indirect taxes, asset sales, borrowing
Spending	current, capital, transfer payments
Deficit / debt	yearly flow / accumulated stock
Expansionary	raise G, cut taxes; AD right
Contractionary	cut G, raise taxes; AD left
Automatic stabilizers	progressive taxes, benefits
Limitations	time lags, crowding out, debt, politics
Multiplier (HL)	ΔY = k × ΔG

Before the exam, make sure you…

•name specific fiscal tools
•use the Keynesian model to show spare capacity
•distinguish deficit and debt
•evaluate with time lags, crowding out and debt sustainability

Fiscal Policy on one page

Cover this page with a sheet of paper and try to rebuild it from memory. Whatever you can't recall is what to revise next.

Figure 7. Topic map for Fiscal Policy.

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