4 Theories of international trade; Government intervention in international trade; Tariff and non-tariff barriers; India’s foreign trade policy

4.1 Why Trade Theories Matter

Trade theories answer three foundational questions: why do countries trade with one another; what pattern of specialisation will emerge; and who gains from trade and how is the gain distributed. The answers have evolved over five centuries — from bullion-hoarding mercantilism to the firm-level imperfect-competition models of the present.

The story unfolds in two broad streams: classical theories (Smith, Ricardo) that emphasise labour productivity, and modern theories (Heckscher-Ohlin, Vernon, Krugman, Porter) that emphasise factor endowments, demand structure and firm strategy.

4.2 Mercantilism (16th–18th Century)

The earliest articulated theory of trade is mercantilism, associated with Thomas Mun, Jean-Baptiste Colbert and Antonio Serra. Its central proposition: national wealth equals stock of precious metals. Trade is therefore a zero-sum game — one country can gain only at another’s loss.

Mercantilism — Working Summary

Element	Mercantilist position
Source of wealth	Stock of gold and silver
Nature of trade	Zero-sum
Policy goal	Maximise exports, minimise imports → favourable balance of trade
Government role	Heavy intervention; tariffs, subsidies, colonies
Demolished by	Hume’s price-specie flow mechanism (1752)

David Hume’s price-specie flow mechanism (1752) demolished mercantilism: bullion inflows raise domestic money supply, raise prices, make exports uncompetitive and reverse the surplus. Neo-mercantilist practices — currency under-valuation, export subsidies, strategic tariffs — survive in modern policy.

4.3 Theory of Absolute Advantage — Adam Smith (1776)

In The Wealth of Nations (1776), Adam Smith demolished mercantilism: trade is positive-sum. A country should specialise in goods it can produce more efficiently than partners and import what others produce more efficiently. The basis: absolute advantage in labour productivity (fewer labour hours per unit).

Absolute Advantage — Worked Example

Country	Labour-hours per kg Tea	Labour-hours per kg Rice
India	4	2
Sri Lanka	3	8

India is faster at rice (2 < 8); Sri Lanka is faster at tea (3 < 4). India should specialise in rice, Sri Lanka in tea, and trade. Limitation: Smith’s theory cannot explain trade when one country has absolute advantage in both goods — Ricardo solves that.

4.4 Theory of Comparative Advantage — David Ricardo (1817)

David Ricardo in Principles of Political Economy and Taxation (1817) proved that even if one country is more productive in every good, mutually beneficial trade is still possible — provided opportunity costs differ. A country should specialise where its relative (not absolute) productivity is highest.

4.4.1 The Classic England–Portugal Example

Ricardo’s Wine–Cloth Example

Country	Cloth (hours per unit)	Wine (hours per unit)
England	100	120
Portugal	90	80

Portugal has absolute advantage in both. But the opportunity cost of cloth in England is 100/120 = 0.83 wine; in Portugal it is 90/80 = 1.125 wine. Cloth is relatively cheaper in England. Conversely, wine is relatively cheaper in Portugal. England specialises in cloth; Portugal in wine; both gain.

flowchart LR
  E[England<br/>Lower opportunity<br/>cost in CLOTH] -- exports cloth --> P[Portugal<br/>Lower opportunity<br/>cost in WINE]
  P -- exports wine --> E
    classDef default fill:#003366,color:#ffffff,stroke:#ffcc00,stroke-width:3px,rx:10px,ry:10px;

4.4.2 Assumptions of the Ricardian Model

Two countries, two goods; labour the only factor; constant returns to scale; no transport cost; perfect competition; full employment. Restrictive — but the direction of the result survives in modern multi-factor models.

4.5 Opportunity Cost Theory — Haberler (1936)

Gottfried Haberler (1936) restated comparative advantage without the labour theory of value. Opportunity cost of a good = amount of a second good foregone to release just enough resources to produce one extra unit of the first. The country with the lower opportunity cost exports. Haberler freed the theory from labour-only production and made it consistent with the production-possibility-frontier framework.

4.6 Heckscher-Ohlin (H-O) Factor Endowment Theory

Eli Heckscher (1919) and his student Bertil Ohlin (1933) shifted the explanation from productivity differences to factor-endowment differences. The H-O theorem states:

“A country exports the commodity that uses its abundant and cheap factor intensively, and imports the commodity that uses its scarce and dear factor intensively.”

A capital-abundant country (USA) exports capital-intensive goods (aircraft, machinery); a labour-abundant country (India) exports labour-intensive goods (textiles, leather).

Comparative Advantage vs Factor Endowment

Aspect	Ricardo (1817)	Heckscher-Ohlin (1919/1933)
Source of advantage	Differences in labour productivity	Differences in factor endowments
Number of factors	One (labour)	Two (labour and capital)
Underlying assumption	Same technology, different productivity	Same technology, different factor abundance

Two important corollaries: the Stolper-Samuelson theorem (a rise in the price of a good raises the real return to the factor used intensively in producing it) and the Factor Price Equalisation theorem (under free trade, factor prices tend to equalise across countries).

4.7 Leontief Paradox (1953)

Wassily Leontief tested H-O against US trade data using his input-output table. Expected: capital-abundant USA exports capital-intensive goods. Found: the opposite — US exports were more labour-intensive than imports. This is the Leontief Paradox.

Explanations: US labour is more productive per worker (in efficiency units, US is labour-abundant); US imports are resource-intensive (oil, minerals); demand reversal. The paradox forced refinements (skilled vs unskilled labour, multi-factor models).

4.8 Linder’s Overlapping Demand (1961)

Staffan Linder argued H-O fits primary commodities but not manufactures traded between similar-income countries. His proposition: countries with similar per-capita incomes have overlapping demand structures, and firms exporting to similar markets enjoy economies of scale and product fit. Linder predicts intra-industry trade is largest among similar countries — strongly supported by post-war European data.

4.9 Vernon’s International Product Life Cycle (1966)

Raymond Vernon (1966) observed many products are invented in advanced economies, produced first at home, then shifted to lower-cost countries as they mature.

Vernon’s Four-Stage IPLC

Stage	Production location	Trade pattern
Introduction	Home (innovator)	Innovator exports
Growth	Innovator + other advanced economies	Multiple advanced exporters; standardisation begins
Maturity	Shift to low-cost developing economies	Developing economies export back to innovator
Decline	Mostly developing economies	Innovator becomes net importer

4.10 New Trade Theory — Krugman (1979)

Classical theory assumed constant returns to scale and perfect competition. Real-world trade is dominated by increasing returns and imperfect competition. Paul Krugman’s new trade theory (1979) incorporates economies of scale and product differentiation.

Two propositions follow: economies of scale make a market bigger than any single country can supply — two countries can both gain by specialising in different varieties of the same good (intra-industry trade); first-mover advantage matters, hence the case for strategic trade policy.

4.11 Porter’s Diamond — National Competitive Advantage (1990)

Michael Porter’s The Competitive Advantage of Nations (1990) asked why specific industries within a country become world-class. His answer: a four-cornered diamond + two externalities.

Porter’s Diamond

Determinant	Content	Indian illustration
Factor conditions	Skilled labour, infrastructure, capital, natural resources	Software talent pool for IT services
Demand conditions	Sophistication and size of home demand	Domestic mobile-data market for telecom
Related and supporting industries	Cluster of capable suppliers and complements	Pune-Chennai auto-component cluster
Firm strategy, structure and rivalry	Domestic competitive intensity	Intense rivalry in Indian generic pharma
(External) Government	Policy, regulation, public investment	Defence procurement spurring DRDO suppliers
(External) Chance	Innovations, wars, exchange-rate shocks	Y2K opportunity for Indian IT

flowchart TB
  FC[Factor<br/>Conditions] --- DC[Demand<br/>Conditions]
  DC --- RS[Related &<br/>Supporting<br/>Industries]
  RS --- FS[Firm Strategy,<br/>Structure, Rivalry]
  FS --- FC
  G[Government] -.-> FC
  CH[Chance] -.-> FS
    classDef default fill:#003366,color:#ffffff,stroke:#ffcc00,stroke-width:3px,rx:10px,ry:10px;

4.12 Summary — Major Trade Theories

Major Trade Theories at a Glance

Theory	Author / Year	Core idea
Mercantilism	Mun, Colbert / 16th–18th c.	Wealth = bullion; trade is zero-sum
Absolute Advantage	Adam Smith / 1776	Specialise where you are absolutely more productive
Comparative Advantage	David Ricardo / 1817	Specialise where opportunity cost is lower
Opportunity Cost	Haberler / 1936	Restates Ricardo without labour theory of value
Factor Endowment (H-O)	Heckscher 1919, Ohlin 1933	Export the good that uses the abundant factor intensively
Leontief Paradox	Leontief / 1953	Empirical contradiction of H-O for US trade
Overlapping Demand	Linder / 1961	Similar-income countries → intra-industry trade
Product Life Cycle	Vernon / 1966	Production migrates from innovator to low-cost economies
New Trade Theory	Krugman / 1979	Economies of scale + product differentiation
National Competitive Advantage	Porter / 1990	Diamond of four determinants

4.13 Government Intervention in International Trade

Governments routinely intervene in trade despite the gains from free trade. Their political and economic rationales:

Why Governments Intervene

Family	Rationale
Political	Protect jobs; protect industries vital to national security; retaliate against unfair foreign practices; protect consumers from unsafe products; further foreign-policy objectives; protect human rights
Economic	Protect infant industries (Friedrich List, 1841); promote strategic trade (Krugman); correct balance-of-payments problems; raise revenue (tariffs); diversify the economy

4.14 Tariff Barriers

A tariff is a tax levied on goods crossing a national border. The classical instrument of protection.

Types of Tariffs

Basis	Categories
Direction	Import tariff · Export tariff · Transit tariff
Purpose	Revenue tariff · Protective tariff
Quantification	Ad valorem (% of value) · Specific (fixed sum per unit) · Compound (both)
Discrimination	Single-column (uniform) · Double-column (MFN + preferential) · Triple-column (general / MFN / preferential)
Production stage	Cascading tariff (rising with processing)
Trade restraint	Anti-dumping duty · Countervailing duty (CVD) · Safeguard duty

The anti-dumping duty offsets dumping — sale below normal value. The CVD offsets foreign export subsidies. The safeguard duty is a temporary protection against surging imports causing serious injury.

4.15 Non-Tariff Barriers (NTBs)

NTBs are all forms of trade restriction other than tariffs. They are harder to detect, harder to negotiate away and have multiplied as tariffs have fallen.

Major Non-Tariff Barriers

Family	Working content
Quotas	Quantitative limit on imports of a good (units or value)
Voluntary Export Restraints (VERs)	Exporter “voluntarily” caps exports under political pressure
Tariff Rate Quota (TRQ)	Low tariff up to a quota; high tariff beyond
Subsidies to domestic producers	Effectively raise import costs by handicapping foreign rivals
Local-content requirements	Mandate a minimum % of inputs sourced locally
Administrative / customs procedures	Lengthy customs clearance, paperwork
Technical / Product standards	Quality, safety, packaging, labelling rules
Sanitary and Phytosanitary (SPS) measures	Food safety, plant and animal health rules
Government procurement rules	Preference to domestic suppliers
Anti-dumping / Countervailing duties	Border duties to neutralise unfair pricing
Currency controls	Exchange-rate manipulation, restrictions on conversion

4.16 India’s Foreign Trade Policy

India’s Foreign Trade (Development and Regulation) Act, 1992 (replacing the Imports and Exports Control Act, 1947) is the foundational statute. Under it, the Foreign Trade Policy is announced by the Directorate General of Foreign Trade (DGFT), Ministry of Commerce and Industry.

4.16.1 Foreign Trade Policy 2023

The current Foreign Trade Policy 2023 — effective 1 April 2023, with no sunset date (continuous updates) — has four pillars:

FTP 2023 — Four Pillars

Pillar	Working content
1. Incentive to remission	Shift from incentive schemes (MEIS) to WTO-compliant remission (RoDTEP)
2. Export promotion through collaboration	States, districts (Districts as Export Hubs), exporters
3. Ease of doing business	Digital, faceless trade processes
4. Emerging areas	E-commerce exports; SCOMET items; rupee trade

4.16.2 Key Indian Trade Promotion Schemes

Major Indian Trade-Promotion Schemes

Scheme	Working content
RoDTEP — Remission of Duties and Taxes on Exported Products	Refunds embedded taxes — WTO-compliant; replaced MEIS
EPCG — Export Promotion Capital Goods	Duty-free import of capital goods against export obligation
Advance Authorisation Scheme (AAS)	Duty-free import of inputs for export production
Duty Drawback	Refund of customs duty on imported inputs used in exports
SEZ — Special Economic Zone (SEZ Act 2005)	Duty-free enclaves for export-oriented production
EOU — Export Oriented Unit	Export-only units with various benefits
PLI — Production-Linked Incentive (since 2020)	Output-linked incentive for 14 sectors
One District One Product (ODOP)	District-level export specialisation

4.16.3 India’s Trade Profile

Merchandise exports ≈ USD 450 bn (FY 2023–24); services exports ≈ USD 340 bn — combined > USD 770 bn.
Top export destinations: USA, UAE, Netherlands, China, Singapore.
Top import sources: China, UAE, USA, Saudi Arabia, Russia.
Persistent merchandise trade deficit, offset partly by services surplus and remittances.
Free Trade Agreements (FTAs): ASEAN (2010 goods, 2014 services), Japan (2011 CEPA), Korea (2010 CEPA), UAE (2022 CEPA), Australia (2022 ECTA), EFTA (2024 TEPA). India opted out of RCEP (2019).

4.17 Practice Questions

Q 01 Mercantilism Easy

Which of the following is not a feature of mercantilism?

AWealth is identified with stock of bullion
BTrade is positive-sum
CImports are to be discouraged
DGovernment intervention is heavy

View solution

Correct Option: B

Mercantilism treats trade as zero-sum, not positive-sum.

Q 02 Authors Easy

Match the trade theory with its principal author:

	Theory		Author
(i)	Absolute Advantage	(a)	Bertil Ohlin
(ii)	Comparative Advantage	(b)	Raymond Vernon
(iii)	Factor Endowment	(c)	David Ricardo
(iv)	International Product Life Cycle	(d)	Adam Smith

A(i)-(d), (ii)-(c), (iii)-(a), (iv)-(b)
B(i)-(a), (ii)-(d), (iii)-(b), (iv)-(c)
C(i)-(c), (ii)-(b), (iii)-(d), (iv)-(a)
D(i)-(b), (ii)-(a), (iii)-(c), (iv)-(d)

View solution

Correct Option: A

Smith 1776 absolute; Ricardo 1817 comparative; Heckscher 1919 / Ohlin 1933 factor-endowment; Vernon 1966 IPLC.

Q 03 Comparative Advantage Medium

Country X needs 4 hours to produce one unit of cloth and 8 hours for wheat. Country Y needs 6 hours for cloth and 6 hours for wheat. According to comparative advantage, country X should specialise in:

ACloth
BWheat
CBoth, since X is faster in both
DNeither, since costs are equal

View solution

Correct Option: A

Opp. cost of cloth in X = 4/8 = 0.5 wheat; in Y = 6/6 = 1 wheat. Cloth is relatively cheaper in X — X specialises in cloth.

Q 04 H-O Medium

The Heckscher-Ohlin theorem predicts that a country will export the good that uses its:

AScarce factor intensively
BAbundant factor intensively
CMost expensive factor intensively
DLeast mobile factor intensively

View solution

Correct Option: B

Export the good that uses the abundant and therefore cheap factor intensively.

Q 05 Leontief Paradox Medium

The Leontief Paradox refers to the empirical finding that:

AUS exports were more capital-intensive than imports
BUS exports were more labour-intensive than imports
CUK exports were more capital-intensive than imports
DTrade volume rose with tariff increases

View solution

Correct Option: B

Leontief found US exports to be labour-intensive, contrary to H-O prediction for a capital-abundant economy.

Q 06 Authors Medium

Match the theory with its central proposition:

	Theory		Proposition
(i)	Linder's Overlapping Demand	(a)	Production shifts from innovator to low-cost economies
(ii)	Vernon's IPLC	(b)	Intra-industry trade is largest among similar-income countries
(iii)	New Trade Theory	(c)	Diamond of four determinants explains industry advantage
(iv)	Porter's Diamond	(d)	Economies of scale and product differentiation drive trade

A(i)-(b), (ii)-(a), (iii)-(d), (iv)-(c)
B(i)-(a), (ii)-(b), (iii)-(c), (iv)-(d)
C(i)-(c), (ii)-(d), (iii)-(b), (iv)-(a)
D(i)-(d), (ii)-(c), (iii)-(a), (iv)-(b)

View solution

Correct Option: A

Linder — similar incomes; Vernon — production migrates; Krugman — scale + variety; Porter — diamond.

Q 07 Chronology Hard

Arrange the following trade theories in chronological order of publication: (i) Heckscher-Ohlin (ii) Ricardo's Comparative Advantage (iii) Vernon's Product Life Cycle (iv) Smith's Absolute Advantage

A(iv), (ii), (i), (iii)
B(ii), (iv), (iii), (i)
C(iv), (i), (ii), (iii)
D(iii), (i), (iv), (ii)

View solution

Correct Option: A

Smith (1776) → Ricardo (1817) → Heckscher-Ohlin (1919/1933) → Vernon (1966).

Q 08 Porter's Diamond Medium

Which of the following is not a corner of Porter's Diamond?

AFactor conditions
BDemand conditions
CGovernment and chance
DFirm strategy, structure and rivalry

View solution

Correct Option: C

Government and Chance are external influences on the diamond — not corners. The four corners are factor, demand, related industries, firm strategy/structure/rivalry.

Q 09 Tariffs Easy

A tariff fixed as a percentage of the value of goods is called:

ASpecific duty
BAd valorem duty
CCompound duty
DAnti-dumping duty

View solution

Correct Option: B

Ad valorem (Latin "according to value") tariffs are levied as a percentage of value.

Q 10 Tariffs Medium

An anti-dumping duty is a measure designed to:

AReduce import volume of luxury goods
BOffset foreign sales below normal value
CSubsidise exporters
DTax services exports

View solution

Correct Option: B

Anti-dumping duty offsets dumping — sale of imported goods below their normal value in the exporter's market.

Q 11 NTBs Medium

Which of the following is not a non-tariff barrier (NTB)?

AImport quota
BVoluntary Export Restraint (VER)
CAd valorem tariff
DLocal-content requirement

View solution

Correct Option: C

An ad valorem tariff is a tariff barrier. The other three are NTBs.

Q 12 Infant Industry Hard

The "infant industry" argument for protection is associated with:

AAdam Smith
BDavid Ricardo
CFriedrich List
DJohn Stuart Mill

View solution

Correct Option: C

Friedrich List in The National System of Political Economy (1841) gave the classical infant-industry argument for temporary protection.

Q 13 India FTP Easy

India's Foreign Trade Policy is announced by:

ARBI
BSEBI
CDGFT under the Ministry of Commerce and Industry
DCustoms Department

View solution

Correct Option: C

The Directorate General of Foreign Trade (DGFT) under the Ministry of Commerce and Industry administers the Foreign Trade (Development and Regulation) Act 1992 and announces the FTP.

Q 14 RoDTEP Medium

RoDTEP — the scheme that refunds embedded taxes on exports — replaced:

AMEIS
BSEZ
CPLI
DDuty Drawback

View solution

Correct Option: A

RoDTEP (Remission of Duties and Taxes on Exported Products) replaced the WTO-incompatible MEIS (Merchandise Exports from India Scheme) from 1 January 2021.

Q 15 SEZ Medium

The Special Economic Zones Act in India was enacted in:

A1991
B2000
C2005
D2015

View solution

Correct Option: C

The SEZ Act 2005 consolidated India's SEZ framework, replacing the EPZ scheme that had operated since 1965 (Kandla, India's first EPZ).

Q 16 India FTAs Hard

India is not a party to which of the following trade arrangements?

AIndia-UAE CEPA (2022)
BIndia-Australia ECTA (2022)
CRCEP
DSAFTA

View solution

Correct Option: C

India opted out of RCEP in 2019 over concerns about competition from Chinese imports and inadequate market-access for Indian services.

Q 17 Strategic Trade Hard

"Temporary government support to industries with strong learning curves and scale economies can shift global market share to home firms." This strategic trade policy argument follows from:

AAdam Smith's absolute advantage
BRicardo's comparative advantage
CKrugman's new trade theory
DHeckscher-Ohlin's factor endowment

View solution

Correct Option: C

Krugman's new trade theory uses scale economies and first-mover advantage to justify temporary strategic-trade interventions.

Q 18 Stolper-Samuelson Hard

The Stolper-Samuelson theorem says that a rise in the relative price of a good:

ARaises the real return to the factor used intensively in producing it
BReduces all factor incomes proportionally
CHas no effect on factor returns
DAlways raises the wage rate

View solution

Correct Option: A

A corollary of the H-O model: protection of an import-competing good raises the real return to the factor used intensively in that good.

Q 19 India Trade Medium

The Foreign Trade (Development and Regulation) Act came into force in India in:

A1947
B1991
C1992
D2005

View solution

Correct Option: C

The Foreign Trade (Development and Regulation) Act 1992 replaced the Imports and Exports Control Act 1947 and provides the legal basis for the Foreign Trade Policy.

Q 20 Diamond Medium

Match each corner of Porter's Diamond with its illustrative element:

	Corner		Element
(i)	Factor conditions	(a)	Demanding domestic consumers
(ii)	Demand conditions	(b)	Skilled human capital and infrastructure
(iii)	Related and supporting industries	(c)	Intense rivalry in the home market
(iv)	Firm strategy, structure and rivalry	(d)	Strong supplier and complementary clusters

A(i)-(b), (ii)-(a), (iii)-(d), (iv)-(c)
B(i)-(a), (ii)-(b), (iii)-(c), (iv)-(d)
C(i)-(c), (ii)-(d), (iii)-(b), (iv)-(a)
D(i)-(d), (ii)-(c), (iii)-(a), (iv)-(b)

View solution

Correct Option: A

Factor → human capital / infrastructure; Demand → demanding consumers; Related → supplier clusters; Firm → rivalry.

4.18 Quick Recall

Quick recall

Mercantilism — wealth = bullion; zero-sum; demolished by Hume’s price-specie flow.
Smith (1776) Absolute Advantage — specialise where absolutely more productive.
Ricardo (1817) Comparative Advantage — specialise where opportunity cost is lower; trade pays even if one country is better at everything.
Haberler (1936) Opportunity Cost — Ricardo without labour theory of value.
Heckscher-Ohlin (1919/1933) — export the good that uses the abundant factor intensively.
Stolper-Samuelson, Factor Price Equalisation — H-O corollaries.
Leontief Paradox (1953) — US exports were labour-intensive, against H-O prediction.
Linder (1961) — similar-income countries trade most (intra-industry).
Vernon (1966) IPLC — production migrates innovator → other advanced → developing.
Krugman (1979) New Trade Theory — economies of scale + product differentiation; case for strategic trade policy.
Porter (1990) Diamond — Factor, Demand, Related industries, Firm strategy/rivalry + Government, Chance.
Tariffs: revenue/protective; ad valorem/specific/compound; anti-dumping, CVD, safeguard.
NTBs: quotas, VERs, TRQs, subsidies, local-content, customs procedures, technical / SPS standards, government procurement, currency controls.
Infant industry — Friedrich List (1841).
India: Foreign Trade (Development and Regulation) Act 1992; DGFT announces FTP; FTP 2023 — RoDTEP, EPCG, AAS, SEZ Act 2005, EOU, PLI (since 2020), Districts as Export Hubs.
India in FTAs: ASEAN, Japan, Korea, UAE (2022), Australia (2022), EFTA (2024). Opted out of RCEP (2019).