Re: [R] zero random effect sizes with binomial lmer

From: Gregor Gorjanc <>
Date: Sun, 31 Dec 2006 12:55:44 +0000 (UTC)

Daniel Ezra Johnson <johnson4 <at>> 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 mailing list PLEASE do read the posting guide and provide commented, minimal, self-contained, reproducible code. Received on Sun 31 Dec 2006 - 13:02:09 GMT

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