, Italy, Spain, and the United Kingdom) to investigate the links between firm age and the participation of the firms in export … revealed is in line with the theoretical considerations. Older firms tend to be more often exporters and importers, they export … to more different destination countries, and they export a higher share of their total sales in three out of five …

sales, and we show that import is even more concentrated than export both within sectors and along the sector and country … diversification of imports. …

exporting only. Second, exploiting firm-level information on the destination of export and the origin of imports, we observe the … international trade, together with some new facts. First, the availability of information on import and export enables us to … differentiate firms involved in both trading activities - namely two-way traders - from firms that only export, and from those that …

- namely two-way traders - from firms that only export, and from those that only import. We show that two-way traders have a … export or import. The paper also looks at how the wages and the skill structure of the trading firms change with the country …