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overdispersed
2009 Apr 11
0
question related to fitting overdispersion count data using lmer quasipoisson
Dear R-helpers:
I have a question related to fitting overdispersed count data using lmer.
Basically, I simulate an overdispsed data set by adding an observation-level
normal random shock
into exp(....+rnorm()).
Then I fit a lmer quasipoisson model.
The estimation results are very off (see model output of fit.lmer.over.quasi
below).
Can someone kindly explain to me what went wrong?
Many thanks in advance.
-Sean
#data sim...
2009 Apr 11
0
Sean / Re: question related to fitting overdispersion count data using lmer quasipoisson
...ail.com>
Date: Sat, Apr 11, 2009 at 12:12 PM
Subject: question related to fitting overdispersion count data using lmer
quasipoisson
To: r-help@r-project.org
Cc: seanecon@gmail.com
Dear R-helpers:
I have a question related to fitting overdispersed count data using lmer.
Basically, I simulate an overdispsed data set by adding an observation-level
normal random shock
into exp(....+rnorm()).
Then I fit a lmer quasipoisson model.
The estimation results are very off (see model output of fit.lmer.over.quasi
below).
Can someone kindly explain to me what went wrong?
Many thanks in advance.
-Sean
#data sim...