In the years before the economic crisis, Portugal had low growth, a decline in export competitiveness and rising imbalances that included a large current account deficit and a strong expansion of the non-tradable sector. Strengthening export performance is therefore one of the principal...

This paper tests some of the predictions of recent advances in trade theory that have focused on different trade patterns of firms within the same sector. Helpman, Melitz and Yeaple (2005) develop a model in which innate productivity differences between firms determine the degree of...