van Ark, B.; Broersma, L.; de Jong, G. - SOM Research Institute, Faculteit Economie en Bedrijfskunde - 1999
This paper has a twofold aim. Firstly, it presents an overview of sources of data on service innovation. We distinguish two levels of data, namely data at the macro-level and data at the micro level. Data at the macro-level are mainly obtained from primary and secondary statistical sources...