Fontana, Roberto; Nuvolari, Alessandro; Shimizu, Hiroshi; … - In: Research Policy 42 (2013) 10, pp. 1780-1792
It is well known that not all innovations are patented, but the exact volume of innovative activities undertaken outside the coverage of patent protection and, relatedly, the actual propensity to patent an innovation in different contexts remain, to a major degree, a matter of speculation. This...