An examination of the Ricardian model of comparative advantage yields the clear result that trade is beneficial for each of the two trading partners since it allows for an expanded consumption choice for each. However, for the world as a whole the expansion of production of one product must involve a decrease in the availability of the other, so that it is not clear that trade is better for the world as a whole as compared to an initial situation of autarky. Are there in fact gains from trade for the world as a whole? Explain.