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st: supply known-variance matrix for xtmixed?
From
Brian Goodness <[email protected]>
To
[email protected]
Subject
st: supply known-variance matrix for xtmixed?
Date
Tue, 30 Aug 2011 17:12:29 -0700
Is there a way in STATA to supply a known-variance matrix (rather than
it be estimated) to the xtmixed command (i.e., specify G, the
covariance matrix for the random effects) for meta-analyses? I am not
familiar with SAS, but according to its syntax for the mixed effects
specification (PROC MIXED), you can read in the G matrix by using the
GDATA= option in the RANDOM statement (see
http://support.sas.com/documentation/cdl/en/statug/63347/HTML/default/viewer.htm#statug_mixed_sect036.htm).
Just wondering if this is possible using STATA, since I'm a STATA
user. Any advice is much appreciated.
--Brian
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