Print

Print


*****  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.