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?

Leontief Paradox

In the early 1950s, Russian-born American economist Wassily W. Leontief studied the US economy closely and noted that the United States was abundant in capital and, therefore, should export more capital-intensive goods. However, his research using actual data showed the opposite: the United States was importing more capital-intensive goods. According to the factor proportions theory, the United States should have been importing labor-intensive goods, but instead it was actually exporting them. His analysis became known as the Leontief Paradox because it was the reverse of what was expected by the factor proportions theory. In subsequent years, economists have noted historically at that point in time, labor in the United States was both available in steady supply and more productive than in many other countries; hence it made sense to export labor-intensive goods. Over the decades, many economists have used theories and data to explain and minimize the impact of the paradox. However, what remains clear is that international trade is complex and is impacted by numerous and often-changing factors. Trade cannot be explained neatly by one single theory, and more importantly, our understanding of international trade theories continues to evolve.