An important topic in the recent literature on firms’ innovation is the question of whether, and to what extent, firms which innovate once have a higher probability of innovating again in subsequent periods. This phenomenon is called the ‘persistence of innovation’. Although the literature...

Firms increasingly rely upon external actors for their innovation process. Interaction with these actors may occur formally (i.e. through a collaboration agreement) or informally (i.e. external actors acts as sources of knowledge). This paper analyses the reasons why firms consider it to be...