The paper explores the argument that trade between the Mercosur countries should be stimulated by preferential policies because of their geographic proximi - ty. That is, that the Mercosur countries are candidates for “natural” integration. The paper finds that, on average, transportation...

The authors explore the argument that trade between the Mercosur countries should be stimulated by preferential policies because of their geographic proximity. That is, that the Mercosur countries are candidates for natural integration. They find that, on average, transportation margins on trade...