Krafft, Jackie; Quatraro, Francesco; Saviotti, Pier-Paolo - HAL - 2011
, to investigate the knowledge base dynamics of the biotechnology sector. Knowledge is here considered a collective good …, closeness and betweenness centrality, to provide a synthetic description of the structure of the knowledge base and of its … evolution over time. Eventually, we compared such measures with more established properties of the knowledge base calculated on …