Message-ID: <loom.20061231T135340-487@post.gmane.org>
Date: 2006-12-31T12:55:44Z
From: Gregor Gorjanc
Subject: zero random effect sizes with binomial lmer
Daniel Ezra Johnson <johnson4 <at> babel.ling.upenn.edu> writes:
...
> If one compares the random effect estimates, in fact, one sees that
> they are in the correct proportion, with the expected signs. They are
> just approximately eight orders of magnitude too small. Is this a bug?
...
BLUPs are essentially shrinkage estimates, where shrinkage is determined with
magnitude of variance. Lower variance more shrinkage towards the mean - zero
in this case. So this is not a bug.
Gregor