Concentration on the few? R&D and innovation in German firms between 2001 and 2013

Under CopyrightRammer, ChristianChristianRammerSchubert, TorbenTorbenSchubert2022-03-072.4.20162016https://publica.fraunhofer.de/handle/publica/29771710.24406/publica-fhg-297717en303600Concentration on the few? R&D and innovation in German firms between 2001 and 2013report