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st: Problems fitting twin data (ACE model) with sem command
From
Jacob Felson <[email protected]>
To
[email protected]
Subject
st: Problems fitting twin data (ACE model) with sem command
Date
Sat, 9 Mar 2013 15:44:01 -0500
I'm wondering if it is possible to estimate a basic ACE (classic twin
model) using the sem command. I think such a model would require
either that error terms be dropped. It doesn't seem possible to drop
the error terms
for endogenous variables in sem.
Is there a workaround?
When I tried to fit such a model, Stata immediately produced an error: the
model was unidentified; too many latent variables.
Jacob Felson
--
Jacob Felson
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