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st: Model identification in Stata sem()


From   W Robert Long <W.R.Long@leeds.ac.uk>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Model identification in Stata sem()
Date   Fri, 07 Dec 2012 18:06:36 +0000

Hi Statalist

In "An Overview of Stata’s “sem” for Structural Equation Modeling" by Bollen and Bauldry (2012) the authors state that a limitation of sem() is in detecting under-identified models, giving an example of a two-indicator CFA with simulated data which is not identified, but Stata gives no warning about that. The document can be downloaded here:
http://www.cpc.unc.edu/training/seminars/BollenBauldry%20SEM%20JAN13.pdf

Yet, here ( http://www.stata.com/capabilities/structural-equation-modeling/ ) it states that models are checked for identification.

Could anyone clarify ?

FWIW I don't have Stata 12 (yet) so I can't check it for myself at the moment.

Thanks !
RL
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