Data is on attendance of suspected members of the Ndrangheta criminal organization at summits (meetings whose purpose is to make important decisions and/or affiliations, but also to solve internal problems and to establish roles and powers) taking place between 2007 and 2009. 2-mode matrix 156 x 47 persons by events (summits), undirected binary ties. Attendance at events have been registered by police authorities through wiretapping and observations during the large investigation called "Operazione Infinito".
covert_33igraph object