Gomory and Baumol note that, to the extent that countries can create a comparative advantage for products with lower production costs, there are many possible outcomes for business models: “These results differ in their impact on the economic well-being of the countries concerned. Some of these results are good for one country, some are good for the other, some are good for both. But it is often true that the results that are best for a country tend to be bad results for its trading partner.  The benefits of an economy resulting from increased exports as a trading partner improve market access. If the U.S. trading partner removes barriers through a trade agreement, U.S. exports are likely to increase, increasing U.S. production and GDP. And suppliers to a company that makes additional sales through exports are likely to increase their sales to that company, which will further increase its GDP. However, in the event of trade diversion, a member makes sales at the expense of a more competitive producer in a country that is not a member of the bloc, simply because its products enter the market of its partner duty-free, while the non-member producer, more competitive, is subject to a discriminatory obligation.  Third-country exporters with a comparative advantage under equal competitive conditions are losing their commercial character. Second, the multilateral removal of trade barriers can reduce political opposition to free trade in each of the countries concerned. This is because groups that otherwise oppose or are indifferent to trade policy reforms could join the free trade campaign if they see the trade agreement as export opportunities to other countries. Therefore, free trade agreements between countries or regions are a useful strategy for liberalizing world trade.
The best possible outcome of trade negotiations is a multilateral agreement that encompasses all major trading countries. Second, free trade will be expanded to allow many participants to make the most of trade. After World War II, the United States helped create the General Agreement on Tariffs and Trade (GATT), which quickly became the world`s largest multilateral trade agreement. A country can also adopt a beggar-thy-neighbor attitude by deliberately using the terms of trade in its favour by introducing an optimal tariff or manipulating currencies.