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2008 Sep 20
0
Error in GEE model fit
Hi,
I would like to fit a GLM model with GEE on clustered data.
I tried to use gee in the GEE package on a twin data set. All cluster
are of size 2. I removed the missing data and ordered by IDENTIF2 first.
library(gee)
mod.pc <- gee(Y ~ X1 + X2 , id = IDENTIF2, family = binomial, corstr
= "unstructured", data = na.omit(df))
gives the following result :
Beginning Cgee S-function, @(#) geeformula.q 4.13 98/01/27
running glm to get initial regression estimate
(Intercept) X...