Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: supply known-variance matrix for xtmixed?


From   Brian Goodness <briangoodness@gmail.com>
To   statalist@hsphsun2.harvard.edu
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

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index