DP Economics HL 4.4 Economic Integration

DP Economics HL 4.4 Economic Integration - Full notes

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DP Economics HL | 4.4 Economic Integration

DP ECONOMICS · UNIT 4: THE GLOBAL ECONOMY

4.4

Economic Integration

Full notes for HL · IB-style

Contents

1	What economic integration is
2	Preferential and bilateral agreements
3	The stages of integration: free trade areas to economic union
4	Benefits and costs of trading blocs
5	Monetary union
6	Trade creation and trade diversion
7	Trade creation and diversion on a diagram (HL only)
8	Stages of economic integration
9	Bilateral and multilateral agreements
10	Free trade areas
11	Customs unions
12	Trade creation
13	Trade diversion
14	Common markets
15	Monetary union
16	Advantages of trading blocs
17	Disadvantages of trading blocs
18	Brexit as a case study
19	Mixed review: worked problems
20	Additional exam-style practice
21	Regional trade agreements around the world
22	Optimum currency areas
23	Integration and the WTO
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
define economic integration and distinguish bilateral, regional and multilateral agreements
distinguish preferential trade agreements, free trade areas, customs unions, common markets and economic and monetary unions
explain the benefits and costs of trading blocs
evaluate monetary union using the eurozone
explain trade creation and trade diversion
show trade creation and trade diversion on a diagram

Section 7 (the diagrammatic analysis) is Additional Higher Level content. Every other section is common to SL and HL.

Guiding questions

Why do countries join trading blocs such as the EU or ASEAN? What do countries gain, and what do they give up, by sharing a currency?

How this topic is examined

Economic integration is examined through definitions (a common market vs a customs union is a favourite) and through evaluation of trading blocs and monetary union, especially the euro.

Strong answers use the correct stage of integration for real examples and weigh the benefits of larger markets against the loss of independent policy.

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

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 What economic integration is

Integration means removing barriers between economies.

Think about it

A Spanish firm can sell to Germany with no tariffs, no customs checks and in the same currency. A Spanish firm selling to Brazil faces all three. How much difference does that make?

Economic integration is the process by which economies become more closely linked through agreements that reduce barriers to trade and to the movement of factors of production, and through coordination of policies.

Agreements can be bilateral (between two countries, such as the UK–Australia trade agreement), regional (among countries in a region, such as ASEAN or the EU) or multilateral (among many countries worldwide, as negotiated through the WTO). A trading bloc is a group of countries that have agreed to reduce trade barriers among themselves.

Quick check

1. Define economic integration.

2. Distinguish bilateral and multilateral agreements.

Answers: 1. linking economies by reducing barriers and coordinating policies 2. bilateral: two countries; multilateral: many countries

2 Preferential and bilateral agreements

The first step: lower barriers for some goods or some partners.

A preferential trade agreement (PTA) gives preferential access to certain products from certain countries, usually by reducing (not eliminating) tariffs. The EU's 'Everything but Arms' scheme, giving the least developed countries duty-free access for most goods, is an example.

Because PTAs and bilateral agreements favour some countries over others, they conflict with the WTO's most-favoured-nation principle, though WTO rules allow them under certain conditions. The rapid growth of such agreements has created a complex 'spaghetti bowl' of overlapping rules.

3 The stages of integration: free trade areas to economic union

Each stage removes more barriers and requires more cooperation.

Stage	Free trade between members	Common external tariff	Free movement of labour and capital	Common economic policies / currency	Example
Free trade area	yes	no	no	no	USMCA, ASEAN Free Trade Area
Customs union	yes	yes	no	no	EU–Turkey customs union; Mercosur (partly)
Common market	yes	yes	yes	no	EU single market
Economic and monetary union	yes	yes	yes	yes	eurozone

Free trade area (FTA). Members remove trade barriers among themselves, but each keeps its own tariffs on non-members. Because external tariffs differ, FTAs need rules of origin to stop goods entering through the member with the lowest tariff and then moving freely to others. These rules add paperwork.

Customs union. A free trade area plus a common external tariff on imports from non-members. Members must negotiate trade deals with other countries as a group. No rules of origin are needed.

Common market. A customs union plus free movement of factors of production: workers can live and work anywhere in the bloc, and capital can move freely. The EU single market is the leading example, also allowing free movement of services.

Economic and monetary union. A common market plus a single currency, a common central bank and monetary policy, and coordination of fiscal policies. The eurozone (20 EU members using the euro, with the European Central Bank) is the main example. The ultimate stage, complete economic integration, would involve unified fiscal policy as well.

Common mistake

Confusing a customs union with a common market. A customs union has free trade in goods and a common external tariff; a common market adds free movement of labour and capital.

Quick check

1. What distinguishes a customs union from a free trade area?

2. What does a common market add to a customs union?

3. Why do free trade areas need rules of origin?

Answers: 1. a common external tariff 2. free movement of labour and capital 3. to stop imports entering via the lowest-tariff member

4 Benefits and costs of trading blocs

Bigger markets, more competition, but some loss of independence.

Benefits	Costs
larger market: economies of scale	loss of sovereignty over trade policy
more competition: efficiency, lower prices	trade diversion away from efficient non-members
increased investment and FDI	structural unemployment in uncompetitive industries
greater bargaining power in world trade talks	costs of adjustment and regulation
free movement of labour and capital (common market)	regional inequality within the bloc
political cooperation and stability	non-members may be harmed

Firms inside a bloc can sell to a much larger market without tariffs, allowing economies of scale and attracting foreign direct investment from firms wanting to produce inside the bloc. Competition from other members pushes down prices and raises efficiency. A bloc can negotiate as one with the rest of the world, giving it more power.

Against this, members give up control over parts of their economic policy, firms that cannot compete may close, and some trade may be diverted from more efficient producers outside the bloc (Section 6).

In the real world

When the UK left the EU in 2020, it left the customs union and single market. Customs checks and rules of origin returned for trade with the EU, and studies have estimated that UK goods trade with the EU has been noticeably lower than it would otherwise have been.

5 Monetary union

A shared currency removes exchange rate costs but also a key policy tool.

A monetary union is a group of countries sharing a single currency and a common monetary policy set by a single central bank.

Benefits. No transaction costs of changing currencies; no exchange rate uncertainty between members, encouraging trade and investment; price transparency, making it easy to compare prices across countries and increasing competition; potentially lower interest rates and inflation if the central bank is credible.

Costs. Members lose independent monetary policy: one interest rate must suit all members, even when their economies are in different situations. A country in recession cannot cut its own interest rates or devalue its currency to regain competitiveness. Members also face fiscal rules limiting deficits and debt. Without large transfers between members or highly mobile labour, adjustment to shocks can be slow and painful.

In the real world

During the eurozone debt crisis from 2010, Greece could not devalue its currency or set its own interest rates. Adjustment came through deep spending cuts and falling wages, and unemployment exceeded 25%.

Key point

Monetary union gives up exchange rate and interest rate flexibility in return for lower transaction costs and certainty. It works best when members' economies move together.

Quick check

1. Give two benefits of monetary union.

2. Why is losing independent monetary policy a cost?

Answers: 1. no exchange costs or uncertainty; price transparency 2. one interest rate may not suit all members' conditions

6 Trade creation and trade diversion

Joining a bloc can create efficient trade, or divert it.

Trade creation occurs when joining a trading bloc leads a country to replace higher-cost domestic production with lower-cost imports from another member. Resources move to more efficient producers, and welfare rises.

Trade diversion occurs when joining a bloc leads a country to switch its imports from a lower-cost non-member to a higher-cost member, because the common external tariff makes the non-member's goods dearer. Production shifts to less efficient producers, and welfare may fall.

Whether a bloc is good for its members overall depends on whether trade creation outweighs trade diversion. Trade creation is more likely when members are already efficient producers of goods the others import, and when the common external tariff is low.

WORKED EXAMPLE 1 Trade creation or diversion?

Before joining a customs union, Country A imports cars from Japan at $20 000 plus a 20% tariff ($24 000). A union member, Country B, sells cars at $22 000. After joining, there is no tariff on B's cars, but a common external tariff of 20% on Japanese cars. Explain what happens.

Solution

After joining: B's cars cost $22 000; Japanese cars cost $24 000M1

A switches imports from Japan to BA1

B's cars cost more to produce ($22 000) than Japan's ($20 000), so this is trade diversionR1

Consumers in A pay less ($22 000 instead of $24 000), but A loses $4 000 tariff revenue per car, so overall welfare may fallR1

Quick check

1. Define trade creation.

2. Define trade diversion.

3. When is trade diversion more likely?

Answers: 1. switching to lower-cost imports from a member 2. switching from a lower-cost non-member to a higher-cost member 3. when the common external tariff is high

7 Trade creation and diversion on a diagram (HL only)

Use the world price and the union price to show welfare changes.

HL only

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

Draw domestic demand and supply. The non-member's price (world price) is the lowest; a tariff raises it above the price of the union partner, so before joining the country imports from the non-member at Pw + tariff. After joining, the country imports from the partner at the union price, which is lower than Pw + tariff but higher than Pw.

The fall in the domestic price increases consumption and reduces inefficient domestic production: these gains are trade creation (shown by two triangles). But imports that previously came from the lower-cost non-member now come from the higher-cost partner: the extra cost is trade diversion, shown by the rectangle between Pw and the union price on the original quantity of imports. The government also loses the tariff revenue it previously collected.

Figure 1. Trade creation (blue triangles) and trade diversion (red rectangle) when a country joins a customs union.

If the trade creation triangles are larger than the trade diversion rectangle, joining the union raises welfare; if smaller, it reduces welfare.

Quick check

1. What does the trade diversion rectangle measure?

2. When does joining a union raise welfare?

Answers: 1. the extra cost of buying from a higher-cost member instead of the non-member 2. when trade creation exceeds trade diversion

8 Stages of economic integration

Deeper and deeper.

Stage	Features	Example
preferential trade agreement	reduced barriers on some goods	many bilateral deals
free trade area	no internal tariffs; own external tariffs	USMCA
customs union	free trade + common external tariff	Southern African Customs Union
common market	customs union + free movement of labour and capital	EU single market
economic and monetary union	common market + single currency	eurozone

9 Bilateral and multilateral agreements

Two or many.

Bilateral agreements are between two countries; regional agreements involve several countries in a region; multilateral agreements involve many countries (WTO negotiations).

Quick check

1. Give an example of a bilateral trade agreement.

Answers: 1. Australia–UK free trade agreement

10 Free trade areas

Removing internal tariffs.

Members remove tariffs between themselves but keep their own external tariffs. Rules of origin are needed to stop goods entering through the member with the lowest tariff (trade deflection).

WORKED EXAMPLE 2 Rules of origin (exam level)

Explain why free trade areas need rules of origin.

Solution

Members have different external tariffsR1

Without rules, imports would enter via the lowest-tariff memberR1

11 Customs unions

A common external tariff.

Members trade freely and apply the same external tariff, so rules of origin are not needed. Members must negotiate trade deals as a bloc, reducing independent trade policy.

Quick check

1. Give one disadvantage of joining a customs union.

Answers: 1. loss of independent trade policy

12 Trade creation

Cheaper sources.

Trade creation occurs when a member switches from higher-cost domestic production to lower-cost imports from another member after tariffs are removed, increasing efficiency and consumer welfare.

WORKED EXAMPLE 3 Trade creation (standard)

Explain trade creation with an example.

Solution

Before: domestic production at high cost due to tariffsR1

After: cheaper imports from a member replace it: efficiency gainR1

13 Trade diversion

More expensive sources.

Trade diversion occurs when imports switch from a low-cost non-member to a higher-cost member because the non-member still faces the external tariff. This reduces efficiency.

WORKED EXAMPLE 4 Trade diversion (exam level)

Before joining a customs union, a country imports cars from Japan at $20 000 + 10% tariff ($22 000). A member produces at $21 000. After joining, explain what happens.

Solution

Member's cars now $21 000 tariff-free; Japanese $22 000R1

Imports switch to higher-cost member: trade diversionR1

14 Common markets

Free movement of factors.

A common market adds free movement of labour and capital. This allows workers to move to where they are most productive and capital to flow to the best investments, but may cause brain drain and pressure on public services.

Quick check

1. Give one benefit and one cost of free movement of labour.

Answers: 1. fills skill shortages; brain drain from poorer members

15 Monetary union

A single currency.

Monetary union shares a single currency and central bank (ECB for the eurozone). Benefits: no exchange-rate risk or conversion costs, price transparency, lower interest rates for some members. Costs: loss of independent monetary policy and exchange rate adjustment.

WORKED EXAMPLE 5 Costs (exam level)

Explain why monetary union can be costly for a member in recession.

Solution

Cannot cut its own interest rates or devalueR1

Must rely on fiscal policy and wage adjustmentR1

In the real world

During the eurozone debt crisis (2010–2015), Greece could not devalue its currency and suffered a deep, prolonged recession with unemployment above 25%.

16 Advantages of trading blocs

Gains.

Larger markets, economies of scale, increased competition, more foreign direct investment, greater bargaining power in negotiations, and political cooperation.

Quick check

1. Why might trading blocs attract foreign direct investment?

Answers: 1. firms gain tariff-free access to a large market

17 Disadvantages of trading blocs

Costs.

Trade diversion, loss of sovereignty, harm to non-members (especially developing countries), adjustment costs for less competitive industries, and possible conflicts with WTO multilateralism.

Quick check

1. How can trading blocs harm developing countries outside them?

Answers: 1. their exports face external tariffs and lose market share

18 Brexit as a case study

Leaving a common market.

The UK left the EU single market and customs union in 2021. Trade with the EU faces new customs checks and rules-of-origin requirements; the UK gained the ability to negotiate its own trade deals. Studies suggest UK–EU trade has been reduced.

Quick check

1. Give one economic cost of Brexit for UK firms.

Answers: 1. new customs checks and paperwork raised trading costs with the EU

19 Mixed review: worked problems

Bringing the ideas together.

WORKED EXAMPLE 6 Mixed problem (exam level)

Distinguish between trade creation and trade diversion.

Solution

Creation: switch from higher-cost domestic production to lower-cost member importsR1

Diversion: switch from lower-cost non-member to higher-cost member importsR1

20 Additional exam-style practice

Paper 1 and Paper 2.

WORKED EXAMPLE 7 Paper 1 part (b) (exam level)

Evaluate the benefits of a country joining a monetary union. [15]

Solution

No exchange-rate risk; lower transaction costs; price transparencyR1 R1

Loss of monetary policy and exchange rate flexibility; one-size-fits-allR1

Example (eurozone); judgementR1 R1

21 Regional trade agreements around the world

Examples.

Examples: EU, USMCA, ASEAN Free Trade Area, Mercosur, African Continental Free Trade Area (AfCFTA), Regional Comprehensive Economic Partnership (RCEP), CPTPP.

Quick check

1. Name a trade agreement involving African countries.

Answers: 1. African Continental Free Trade Area (AfCFTA)

22 Optimum currency areas

When a shared currency works.

A single currency works best when members have similar business cycles, flexible labour markets, labour mobility and fiscal transfers between regions. Without these, shocks affecting one member are hard to absorb.

Quick check

1. Why do fiscal transfers help a monetary union?

Answers: 1. they support regions hit by shocks when exchange rates cannot adjust

23 Integration and the WTO

Building blocks or stumbling blocks?

Supporters argue regional agreements are stepping stones to global free trade; critics argue they divert trade and complicate the trading system with overlapping rules (the 'spaghetti bowl').

Quick check

1. What is the 'spaghetti bowl' effect?

Answers: 1. many overlapping agreements with different rules

24 Common misconceptions and links

Students often think…	Actually…
a free trade area has a common external tariff	that is a customs union
a common market has a single currency	that is a monetary union
all trade within a bloc is beneficial	trade diversion can reduce welfare
monetary union has no costs	members lose independent monetary policy and the exchange rate

How 4.4 connects to the rest of the course

Topic	Connection
4.1 Benefits of trade	gains from specialization and larger markets
4.2 Protection	common external tariffs
4.5 Exchange rates	monetary union removes exchange rates between members
3.6 Monetary policy	one interest rate for many economies

25 Exam-style question with markscheme

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

Figure 2. Unemployment in Greece and the eurozone.

Text A. During the debt crisis, Greece could not devalue its currency or cut its own interest rates. It was required to make deep spending cuts, and unemployment soared.

(a) Define monetary union. [2]

(b) Distinguish between a customs union and a common market. [2]

(d) Explain two benefits of the euro for member countries. [4]

Markscheme

Part	Answer	Marks
(a)	countries sharing a single currency	A1
	with a common central bank and monetary policy	A1
(b)	customs union: free trade + common external tariff	A1
	common market adds free movement of labour and capital	A1
(c)	could not devalue to regain competitiveness	R1
	interest rates set for the whole eurozone	R1
	fiscal rules forced spending cuts	R1
	adjustment through falling wages and higher unemployment	R1
(d)	no transaction costs	R1 A1
	no exchange rate uncertainty / price transparency	R1 A1

Examiner's comments. In (c), the best answers linked the loss of the exchange rate and interest rate tools directly to the depth of the recession.

26 Check your understanding

Section A: multiple choice

1. A free trade area removes tariffs between members but

A. each member keeps its own external tariffs B. has a common external tariff C. shares a currency D. has free movement of labour

2. A customs union adds to a free trade area

A. a single currency B. free movement of labour C. a common external tariff D. common fiscal policy

3. A common market includes

A. a single currency only B. free movement of factors of production C. no external tariffs D. separate trade policies

4. The eurozone is an example of

A. a free trade area B. a preferential agreement C. a bilateral agreement D. a monetary union

5. Trade diversion occurs when imports shift

A. from a member to a non-member B. from a lower-cost non-member to a higher-cost member C. to domestic producers D. to cheaper members

6. A cost of monetary union is

A. loss of independent monetary policy B. higher transaction costs C. more exchange rate risk D. less price transparency

7. Rules of origin are needed in

A. customs unions B. monetary unions C. common markets only D. free trade areas

8. A benefit of a trading bloc is

A. higher tariffs between members B. less competition C. a larger market and economies of scale D. trade diversion

Section B: structured

9. Distinguish between a free trade area and a customs union. [4]

10. Evaluate the benefits and costs of monetary union. [8]

11. Explain trade creation and trade diversion with examples. [4]

Answers

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

9. FTA: free trade, own external tariffs, rules of origin; customs union: common external tariff, negotiate as a group.

10. Benefits: no transaction costs, certainty, transparency; costs: loss of monetary policy and devaluation, fiscal rules; eurozone crisis; judgement.

11. Creation: switch from costly domestic production to cheaper member imports; diversion: switch from cheap non-member to dearer member because of the CET.

27 Summary and topic map

Idea	Remember
Agreements	bilateral, regional, multilateral; PTAs
FTA	free trade; own external tariffs; rules of origin
Customs union	+ common external tariff
Common market	+ free movement of labour and capital
Monetary union	+ single currency and central bank
Trading blocs	scale, competition, FDI vs sovereignty, diversion
Trade creation / diversion	cheaper member imports / dearer member imports

Before the exam, make sure you…

•use the correct stage for real examples
•distinguish customs union from common market
•evaluate monetary union with the eurozone
•explain trade diversion with prices

Economic Integration 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 3. Topic map for Economic Integration.

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