- Defined : A country will export goods with a low opportunitycost and import goods with a high opportunity cost
- Key is relative or comparative, one country cannot produceeverything
-Comparative vs. Absolute advantage
-Gains from Trade – models
-Production Possibility Frontier (PPF)
-Economies of scale – Efficiency (slope of PPF)
-Aggregate shifts in PPF
-Efficiencies in resources
-Hechscher-Ohlin model – some countries have moreresources
-China- labor vs. US Agriculture
-Flaw – assumes tech is equal