[Rsiena-help] undirected networks in RSiena

[Ruth M. Ripley]

Kevin,

1) There is an option called modelType which is not available via the GUI.
The documentation is rudimentary at the moment, I am afraid. 
?sienaModelCreate will tell you the possible values. I think 3 is what you 
need.

2) It is no longer necessary to use the finite difference method for 
undirected networks.

Hope this helps,

Ruth

On Wed, 16 Mar 2011, Kevin Lewis wrote:

> greetings,
>
> i wonder if anyone can provide an update on current functionality for 
> undirected networks in RSiena? it appears that RSiena indeed recognizes my 
> network as undirected, but this case is not as thoroughly documented in the 
> most recent manual. in particular i am wondering about the following:
>
> 1) if i recall correctly, version 3 did not allow estimation by the score 
> function method, and instead forced the "finite differences" method for all 
> undirected models. however, when i run an undirected model in RSiena, it 
> seems i am able to select the score function method without problem (and the 
> output reports that standard errors are estimated with the likelihood ratio 
> method, which i assume is the same thing). am i correct in interpreting this 
> to mean that the score function method is now available for undirected 
> networks in RSiena?
>
> 2) while RSiena will successfully run an undirected model, the "model 
> options" screen still looks identical to the options screen for directed 
> networks- and therefore i am unable to select which of the 6 undirected 
> model types i would like to use (a possibility that was available in version 
> 3). the output reports, however, that "Model Type 2: Forcing model" appears 
> to be the default. is there a way to change this to another type, in 
> particular the initiative-confirmation model? if not, is there reason to 
> believe this will influence results anyway? (i recall reading somewhere that 
> results did not vary much across different undirected model types.)
>
> i am obviously also using the GUI, so perhaps this is something i can 
> accomplish without the GUI.
>
> thanks for any help with this!
>
> -kevin
>
> -- 
> Kevin Lewis
> Ph.D. Candidate in Sociology
> Harvard University
> 33 Kirkland Street
> Cambridge, MA 02138
>
> _______________________________________________
> Rsiena-help mailing list
> Rsiena-help at lists.r-forge.r-project.org
> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rsiena-help
>