International trade-the exchange of goods and services1borders is often explained by the theory of comparative advantage which has become the cornerstone of modern thinking2 international trade This theory was produced by David Ricardo3was an English economist in the nineteenth century This theory points out that trade between countries can be 4 beneficial even if a country is less 5than another in the production of every commodity As6as there are minor, relative differences in the efficiency of producing a commodity,7the poor country can have a comparative advantage in producing 8 comparative advantage is not a static concept A country may 9 a particular comparative advantage purely through its own actions, independent of the endowments of nature A case in point is Switzerland’s10advantage in watchmakin