This paper presents estimates of the long-term impact of various sources of knowledge (R&D performed by the business sector, the public sector and foreign firms) on multifactor productivity growth of 16 countries from 1980 to 1998. The main results show that the three sources of knowledge are...

Patenting strategy, technological diversity, domestic and international R&D collaborations and/or co-applications, and the mix of designated states for protection 'also' affect the value of patents. © Elsevier Science S.A.