In the post-war period, the goods composition of trade in OECD countries has changed considerably. We analyze the evolution of comparative advantage using a detailed trade data set and a new analytical tool: the harmonic (weighted) mass index, which enables us to identify periods of structural...

A number of authors have used the concept of an optimum currency area (or OCA) index to assess the relative proximity of various pairs of economies to the ideal of an optimum currency area. Alas, a significant deficiency of this approach as used so far is that it provides no room for long-term...