The fundamental problem in the field of the economics of innovation is which economic subjects are the sources of radical innovations and high technological performances. The study here confronts this problem by developing a theoretical framework underpinned in the concept of purposeful system...

Frame and Carpenter 1979 analysed the pattern of international research collaboration among scientific fields in 1970s. Starting from this pioneering work, this paper investigates international collaborations over 1997-2012 and compares the critical results with earlier studies to detect the...