- The absolute advantage theory of international trade originated from Adam Smith's work, which argued that countries should specialize in producing goods they are relatively more efficient at and trade for goods from other countries.
- According to the theory, countries have an absolute advantage in producing goods for which they have lower opportunity costs compared to other countries. They should export goods they have an absolute advantage in and import goods other countries have an absolute advantage in.
- Through specialization and trade based on absolute advantages, global production is increased and all trading partners can gain. The theory assumes two countries, two goods, and mobility of labor but not between countries. It also does not consider transportation costs or variations in country size.