The Ohlin Model is a theoretical framework used to explain international trade patterns based on differences in factor endowments between countries. The model was developed by Swedish economist Bertil Ohlin in the 1930s and is also known as the Heckscher-Ohlin Model.

The model assumes that countries have different endowments of factors of production, such as labor, capital, and natural resources. These differences in factor endowments lead to differences in production costs and hence comparative advantages in producing certain goods. For example, a country with abundant labor will have a comparative advantage in producing labor-intensive goods, while a country with abundant capital will have a comparative advantage in producing capital-intensive goods.

The Ohlin Model also assumes that factors of production are mobile within a country but not between countries. This means that labor and capital can move freely within a country to where they are most productive, but they cannot move across borders to take advantage of differences in factor endowments between countries.

The model predicts that countries will specialize in producing and exporting goods that use their abundant factors of production and import goods that use their scarce factors of production. This leads to trade patterns where countries trade goods that are complementary to their own production.

The Ohlin Model has been criticized for its simplifying assumptions and for not fully explaining the complexities of international trade. However, it remains a useful framework for understanding the basic principles of international trade and comparative advantage.