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***** To join INSNA, visit http://www.insna.org ***** I happened to come across this section on page 165 of Tom Valente's very helpful book Social Networks and Health (2010) today, and I think it might help to solve your question: "Out-degree is always included in an actor-based model to control for density. Out-degree parameter estimates are almost always negative, which suggests that ties are structured and nonrandom (a positive out-degree would indicate that network structures would tend to become decentralized with a density of 50%)." Hope this helps, Adam Adam Jonas, M.A. Center on Drug and Alcohol Research University of Kentucky 333 Waller Avenue Lexington, KY 40504-2915 [log in to unmask]<mailto:[log in to unmask]><mailto:[log in to unmask]> ________________________________ From: Social Networks Discussion Forum [[log in to unmask]] On Behalf Of Ian McCulloh [[log in to unmask]] Sent: Wednesday, March 21, 2012 6:44 AM To: [log in to unmask] Subject: Re: [SOCNET] Need suggestions and comments ***** To join INSNA, visit http://www.insna.org ***** It is common in face to face networks for outdegree to be significant with a negative coefficient. This is due to the social cost of maintaining a link. Ian McCulloh On Mar 20, 2012, at 10:33 PM, Shahadat Uddin <[log in to unmask]<mailto:[log in to unmask]>> wrote: ***** To join INSNA, visit http://www.insna.org ***** Dear SOCNET Scientists, I have a longitudinal dataset (at four time points). To analyze evolutionary dynamics for this dataset I applied stochastic actor-based models using RSiena. I found out-degree as playing statistically significant role in this evolution process (i.e., ratio of error and estimation is more than 2). Is that mean those actors who have higher out-degree centrality values play major role compared to those who have lower out-degree centrality values in the evolution process of my dataset? Please clear me in this respect? Regards Shahadat _____________________________________________________________________ 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]<mailto:[log in to unmask]> containing the line UNSUBSCRIBE SOCNET in the body of the message. _____________________________________________________________________ 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. _____________________________________________________________________ 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.