CONSIDER a very simple picture, of a world in which there are only two countries that are engaged in trade. One of the two has a current account surplus while the other, by definition, has an identical current account deficit. It is reasonable to assume that since the surplus country is obviously more successful as an international competitor, it would be close to full capacity-use in a regime of free trade, while the deficit country that is weaker in its competitiveness would have much larger unutilized capacity.