Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: Constraining covariance (HLM)
From
"Saul G. Alamilla" <[email protected]>
To
Statalist <[email protected]>
Subject
st: Constraining covariance (HLM)
Date
Thu, 13 Jan 2011 12:34:19 -0800 (PST)
Dear Statalist Members:
I have a question about constraining covariance(s) in HLM:
Say I have a random intercepts and slopes model w/nested data. I believe STATA's default is to make the random intercept and slope uncorrelated. You have to specify cov(un) to do otherwise. HLM's default appears to be: cov(un), and there doesn't appear to be a way to UNDO this, so that the two effects are assumed uncorrelated.
Is there a way to have the two uncorrelated in HLM?
Thanks,
S
*
* 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/