What Is International Trade Theory?

Read this introduction to mercantilism and the difference between classical country-based theories and modern firm-based theories. What is the historical significance of mercantilism for international trade patterns?

2.1 What Is International Trade Theory?

What Are the Different International Trade Theories?

"Around 5,200 years ago, Uruk, in southern Mesopotamia, was probably the first city the world had ever seen, housing more than 50,000 people within its six miles of wall. Uruk, its agriculture made prosperous by sophisticated irrigation canals, was home to the first class of middlemen, trade intermediaries… A cooperative trade network… Set the pattern that would endure for the next 6,000 years.

In more recent centuries, economists have focused on trying to understand and explain these trade patterns. Chapter 1 "Introduction", Section 1.4 "The Globalization Debate" discussed how Thomas Friedman's flat-world approach segments history into three stages: Globalization 1.0 from 1492 to 1800, 2.0 from 1800 to 2000, and 3.0 from 2000 to the present. In Globalization 1.0, nations dominated global expansion. In Globalization 2.0, multinational companies ascended and pushed global development. Today, technology drives Globalization 3.0.

To better understand how modern global trade has evolved, it's important to understand how countries traded with one another historically. Over time, economists have developed theories to explain the mechanisms of global trade. The main historical theories are called classical and are from the perspective of a country, or country-based. By the mid-twentieth century, the theories began to shift to explain trade from a firm, rather than a country, perspective. These theories are referred to as modern and are firm-based or company-based. Both of these categories, classical and modern, consist of several international theories.