The Melitz model highlights the importance of the extensive margin (the number of firms exporting) for trade flows. Using the World Bank's Exporter Dynamics Database (EDD) featuring firm-level exports from 50 countries, we find that around 50% of variation in exports is along the extensive...

Most trade is invoiced in very few currencies. Yet, standard models assume prices are set in either the producer's or destination's currency. We present instead a ‘dominant currency paradigm' with three key features: pricing in a dominant currency, pricing complementarities, and imported input...