***** To join INSNA, visit http://www.insna.org ***** I was involved in an exploratory longitudinal study of the evolution of an academic co-authorship network over 32 years. Maybe, the resulting paper and the event-driven dynamic network analysis approach that we adopted are useful for your project: Trier, M. & Molka-Danielsen, J. (2013). Sympathy or strategy: social capital drivers for collaborative contributions to the IS community. European Journal of Information Systems, 22(3), 317-335. Link: http://dx.doi.org/10.1057/ejis.2012.27 The following link takes you to interesting additional material, e.g. a comparison of time periods and a related video of the dynamic evolution of the network: http://www.commetrix.net/irisnetwork In our study, we could make use of the dynamic SNA tool Commetrix (commetrix.net) to visually trace how the network evolves and to derive interesting periods (we had different countries taking over central positions, as well as different topics). This event-driven approach is not requiring fixed time periods and gives a good impression how these network evolved. Also, the research was exploratory and used many network parameters. We found the very long diameter and generally path lengths (or low transitivity) quite revealing. Best, Matthias Trier -- Dr. Matthias Trier Associate Professor Department of IT Management Copenhagen Business School _____________________________________________________________________ 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.