Comparative advantage theory assumes perfect information for both producers and consumers
Transport costs are assumed to be zero
Countries without the comparative advantage may be able expensive R&D and create patentable products
Comparative advantage assumes no economies of scale advantage
Comparative advantage ignores the impact of exchange rate changes
High inflation over time can erode price competitiveness of goods and services.
Protectionist measures such as tariffs and quotas can be used governments in countries without the comparative advantage. This can distort compartive advantage
Countries without the comparative advantage may be highly non-price competitive