“…The number of links sent out from an actor, or outgoing ties an actor gives out, is a measure of out-degree centrality and it is an indication of knowledge dispersal or advice by an actor [12,43-45**]. Together, these two indicators form degree centrality (Fig 1.2a) and the weighted calculation of the number and ratio of in-degree and out-degree centrality is an indicator of influence [27,29,32,37,41,42,46]. When the same actors have the high in-degree and high influence centrality, this indicates a network structure in which knowledge exchange is highly controlled and centralized.…”