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Hi Reza.

Two points:

1) There is the StOCNET users group that may be more appropriate for such questions: https://groups.yahoo.com/neo/groups/stocnet/info

2) The SAOM defines the process by which observation one turned into observation two, in your case. Assuming your reciprocity effect was of the "evaluation" type, the associated parameter suggests that reciprocity played a role in actors' decision to maintain or create reciprocal ties. In order to make a statement about whether an intervention had an effect on reciprocity, you would need an observation prior to your first so that you had a total of three observations and thus two time periods. You could then model the two time periods using a time dummy interacted with reciprocity to capture a difference in reciprocity between the two periods. The usual threats to validity apply.

-Nate

--
Nathan J. Doogan, Ph.D. | College of Public Health | The Ohio State Univ.

________________________________
From: Social Networks Discussion Forum [[log in to unmask]] on behalf of Reza Yousefi-Nooraie [[log in to unmask]]
Sent: Tuesday, March 31, 2015 5:17 PM
To: [log in to unmask]
Subject: [SOCNET] Interpreting stochastic actor oriented models

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Dear SOCNETers,
I need help interpreting the parameter estimates in stochastic actor-oriented models.
Suppose we are assessing the evolution of advice networks in an organization between 2 time points. One variable of interest is the reciprocity. At baseline the staff reciprocated each other, significantly more than chance. Between two time points there have been efforts to promote reciprocity. The reciprocity effect in the actor-oriented model is significant and positive. Does it mean that the reciprocity significantly improved over time, or it only reflects the baseline tendency (meaning that if people have opportunity to make a tie, they prefer to reciprocate)?
Thanks a lot

Reza Yousefi Nooraie
PhD candidate at Health Research Methodology program, McMaster University



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_____________________________________________________________________
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.