NREC4410: International Agricultural Trade

Coursebook

Author

Prof. Osman Gulseven

Published

June 13, 2026

Overview

Part I introduces the basic logic of international trade. The main question is simple:

Why do countries trade, and how can trade make countries better off?

The three chapters in this part move from basic trade concepts to two core models of trade. Chapter 1 introduces international trade, globalization, trade openness, and Oman’s trade profile. Chapter 2 explains trade based on technology differences using the Ricardian model. Chapter 3 explains trade based on resource differences using the Heckscher-Ohlin model.

Chapters in this part

Chapter	Main focus	What you should be able to do
Chp 1. Introduction to International Trade	Trade concepts, globalization, trade openness, Oman trade indicators	Define exports and imports, calculate trade openness, and interpret Oman’s trade structure
Chp 2. The Ricardian Model	Opportunity cost, comparative advantage, PPF, TPF	Identify comparative advantage and explain gains from specialization and trade
Chp 3. The Heckscher-Ohlin Model	Factor abundance, factor intensity, income distribution	Explain how labor and capital endowments shape trade patterns and factor income effects

Learning path

The logic of Part I is cumulative.

First, we define the basic vocabulary of international trade. Then we ask why countries trade even when one country may be more productive than another. Finally, we move from productivity differences to resource differences and examine how trade affects income distribution.

flowchart LR
  A["Chp 1\nTrade concepts"] --> B["Chp 2\nTechnology differences"]
  B --> C["Chp 3\nResource differences"]
  C --> D["Part II\nWelfare and policy"]

Key concepts

By the end of Part I, you should understand the following concepts:

exports and imports
trade balance
trade openness
globalization
opportunity cost
absolute advantage
comparative advantage
production possibility frontier
trade possibility frontier
factor abundance
factor intensity
Heckscher-Ohlin theorem
income distribution effects of trade

How to study this part

Do not memorize the models as abstract theory. Focus on the economic logic.

For the Ricardian model, ask:

Which country gives up less of one good to produce the other good?

For the Heckscher-Ohlin model, ask:

Which country has more of the factor used intensively in producing a good?

For Oman-related applications, ask:

What does Oman’s export and import structure reveal about specialization, dependence, and diversification?

Bridge to Part II

Part I explains why trade happens. Part II will ask a different question:

Once trade changes prices, who gains, who loses, and what happens to national welfare?

This is where we introduce consumer surplus, producer surplus, tariffs, quotas, subsidies, and other trade policy instruments.

--- title: "NREC4410" --- ## Overview Part I introduces the basic logic of international trade. The main question is simple: > Why do countries trade, and how can trade make countries better off? The three chapters in this part move from basic trade concepts to two core models of trade. Chapter 1 introduces international trade, globalization, trade openness, and Oman’s trade profile. Chapter 2 explains trade based on **technology differences** using the Ricardian model. Chapter 3 explains trade based on **resource differences** using the Heckscher-Ohlin model. ## Chapters in this part | Chapter | Main focus | What you should be able to do | |---|---|---| | [Chp 1. Introduction to International Trade](part-i-foundations/chp-01-introduction.qmd) | Trade concepts, globalization, trade openness, Oman trade indicators | Define exports and imports, calculate trade openness, and interpret Oman’s trade structure | | [Chp 2. The Ricardian Model](part-i-foundations/chp-02-ricardian-model.qmd) | Opportunity cost, comparative advantage, PPF, TPF | Identify comparative advantage and explain gains from specialization and trade | | [Chp 3. The Heckscher-Ohlin Model](part-i-foundations/chp-03-heckscher-ohlin-model.qmd) | Factor abundance, factor intensity, income distribution | Explain how labor and capital endowments shape trade patterns and factor income effects | ## Learning path The logic of Part I is cumulative. First, we define the basic vocabulary of international trade. Then we ask why countries trade even when one country may be more productive than another. Finally, we move from productivity differences to resource differences and examine how trade affects income distribution. ```{mermaid} flowchart LR A["Chp 1\nTrade concepts"] --> B["Chp 2\nTechnology differences"] B --> C["Chp 3\nResource differences"] C --> D["Part II\nWelfare and policy"] ``` ## Key concepts By the end of Part I, you should understand the following concepts: - exports and imports - trade balance - trade openness - globalization - opportunity cost - absolute advantage - comparative advantage - production possibility frontier - trade possibility frontier - factor abundance - factor intensity - Heckscher-Ohlin theorem - income distribution effects of trade ## How to study this part Do not memorize the models as abstract theory. Focus on the economic logic. For the Ricardian model, ask: > Which country gives up less of one good to produce the other good? For the Heckscher-Ohlin model, ask: > Which country has more of the factor used intensively in producing a good? For Oman-related applications, ask: > What does Oman’s export and import structure reveal about specialization, dependence, and diversification? ## Bridge to Part II Part I explains **why trade happens**. Part II will ask a different question: > Once trade changes prices, who gains, who loses, and what happens to national welfare? This is where we introduce consumer surplus, producer surplus, tariffs, quotas, subsidies, and other trade policy instruments.