***** To join INSNA, visit http://www.insna.org ***** All, I have what seems to be a simple question about interlocking networks, but I'm having trouble coming up with a straightforward answer. Any suggestions would be much appreciated. Given a two-mode person-to-group network X, it is easy to obtain a one-mode person-to-person network Y. Namely, Y = X * X' (see Breiger 1976). What is the smallest number of groups in X that can produce a given network Y? And, relatedly, what features of Y influence how many groups are needed in X. Thanks Zachary -- Zachary Neal, Assistant Professor Michigan State University Department of Sociology & Global Urban Studies Program 316 Berkey Hall East Lansing, MI 48824 http://www.msu.edu/~zpneal _____________________________________________________________________ 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.