Empirical investigations with enterprise level data from official statistics often use the averagewage as a proxy variable for the qualification of the workforce, mostly due to the lack ofdetailed information on the qualification of the employees. This paper uses unique newlyavailable data for...

An emerging literature on international activities of heterogeneous firms documents that exporting firms are more productive than firms that only sell on the national market. This positive exporter productivity premium shows up in a large number of empirical studies after controlling for...

This study reports results from an empirical investigation of business services sector firms that (start to) export, comparing exporters to firms that serve the national market only. We estimate identically specified empirical models using comparable enterprise level data from France, Germany,...