Arvanitis, Spyros; Hollenstein, Heinz - In: Swiss Journal of Economics and Statistics (SJES) 130 (1994) III, pp. 523-537
Most empirical studies on innovative activity are based on a single (or a very small number of) indicator(s), a procedure not appropriate to the complexity of the innovation process. In this study, using factor analysis we develop at the firm level a composite innovation measure which contains...