Third, a country’s trade surplus or deficit is shaped less by the content of its trade agreements – tariff levels, quotas, regulatory rules and so on – than by the balance between domestic saving and investment within its own economy. Take the European Union: the entire bloc has exactly the same trade policy. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.