***** To join INSNA, visit http://www.insna.org ***** Suppose you are interested in calculate actors' centrality, but also the attributes of alters are important. For example: you are studying the roles of different people in innovation processes: it is not only important having many ties, but also having them with alters with different attributes (i.e. different departments, organizations, etc.). Therefore, an actor could be more central not only for the number of his ties, but also for the destination of his ties. Is there an index calculating the centrality (above all betweenness centrality) "weighted" by the attributes of the tied alters? Thank you very much Giancarlo Oriani _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.