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...

This paper compares and analyses the East and West German levels of labour productivity in industries in 1936. For this purpose archive-data on the industrial census of 1936 were used. In comparison with earlier studies, which rely directly or indirectly on the official publication of the...