Increasing-returns-to-scale imperfect competition trade models predict a more than proportionate relationship between the larger country s share in world endowments and its share in producing firms: the so called home market effect (HME). We show that the single-sector Melitz (2003) model...

We derive a simple equation for the welfare gains from trade when tariffs are liberalized or iceberg trade costs fall. Covering various one-sector trade models that may or may not feature extensive margins and imperfect competition, we generalize the analysis of Arkolakis, Costinot and...

Since the 1990s,Germany and other European countries have become more open to trade. The period is characterized by the fall of the iron curtain, the surge of China and its accession to the World Trade Organization (WTO), the introduction of the Euro, the creation of the Schengen area, the...