Bonfiglioli, AlessandraCrinò, RosarioGancia, Gino A.Universitat Pompeu Fabra. Departament d'Economia i Empresa2020-05-252020-05-252019-02-01http://hdl.handle.net/10230/44681We use transaction-level data to study changes in the concentration of US imports. Concentration has fallen in typical industry, while it is stable by industry and country of origin. The fall in concentration is driven by the extensive margin: the number of exporting firm has grown, and the number of exported products has fallen more for top firms. Instead, average revenue per product of top firms has increased. At the industry level, top firms are converging, but top firms within country are diverging. These facts suggest that intensified competition in international markets coexists with growing concentration among national producers.application/pdfengL'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative CommonsConcentration in international markets: evidence from US Imports<resourceType xmlns="http://datacite.org/schema/kernel-3" resourceTypeGeneral="Other">info:eu-repo/semantics/workingPaper</resourceType><subject xmlns="http://datacite.org/schema/kernel-3" subjectScheme="keyword">superstar firms</subject><subject xmlns="http://datacite.org/schema/kernel-3" subjectScheme="keyword">concentration</subject><subject xmlns="http://datacite.org/schema/kernel-3" subjectScheme="keyword">us imports</subject><subject xmlns="http://datacite.org/schema/kernel-3" subjectScheme="keyword">firm heterogeneity</subject><subject xmlns="http://datacite.org/schema/kernel-3" subjectScheme="keyword">international trade.</subject><subject xmlns="http://datacite.org/schema/kernel-3" subjectScheme="keyword">Macroeconomics and International Economics</subject><rights xmlns="http://datacite.org/schema/kernel-3">info:eu-repo/semantics/openAccess</rights>