On January 17. 2019 he presented a paper (co-authored by Michael Fritsch, Friedrich Schiller University Jena) entitled ‘Co-existence of macro stability and micro fluidity of inventor networks - evidence from German Laser Technology inventor networks since 1960s’ at the Bristol Centre for Economics and Finance (BCEF) Research Seminar. 

In this paper, the authors address widely neglected structural network phenomena and provide an empirically substantiated explanation for the co-existence of macro stability and micro fluidity of inventor networks.

Abstract:
From a macro perspective, inventor networks are characterized by rather stable structures. The high levels of fluidity of inventors and their links contradicts this macro pattern. Based on co-patenting relationships among inventors in the German laser industry over a period of 45 years we zoom into intermediate group structures in order to explain these contradicting patterns. Our findings suggest that persistence of individual actors is not a key factor in maintaining structural networks stability. Rather stabilizing roles occupied by frequently changing actors at the intermediate level of inventor groups are a source of stability.