Knowledge intensive business service firms (KIBS) are an important element of modern economies and thus attracting increasing interest in scientific research. In the existing literature it is argued that due to the important role of knowledge, innovation and user-producer interaction in the KIBS...

The present paper analyses whether and how the affiliation of a firm to a business group affects its productivity. Based on novel data consisting of official firm data from the German Business Register including ownership information from Bureau van Dijk’s MARKUS database and from the...