***** To join INSNA, visit http://www.insna.org ***** Good feedback Ryan, Diana. The problem with models is always what to include and what to leave out. You want to make them easy enough to understand and use [by more people than the designer]. Yet, you do not want to make them too easy, so they lose all touch with reality or the client/analyst says "so what". In my 20+ of business experience in building many models, mostly of a network nature [not talking about financial models], I have found that on the continuum from toy model to "everything + 2 back up systems" there is a sweet spot, about a 1/3 of the way down from the easy end where you can teach/learn some complex concepts with a sufficiently robust model, that still retains simplicity. My experience in pushing down that continuum toward the high end is that it brings less and less return for time invested. Of course I am a practitioner and this may not be a good rule of thumb in academia. Yes, if I was doing this for a client I would break up the EU node into constituent pieces -- at least show those countries that have significant military/economic ties with any of the Mideast countries. Also, breaking up the positive ties into two networks/sets would also be prudent -- 1)economic, 2) military. Even these two distinctions could be easily divided further. But for now, I just want to start learning how negative ties may affect an interconnected system of players. Valdis _____________________________________________________________________ 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.