Hi
 
I am struggling with nested random effects and hope someone can help.
 
 
 
I have individuals (ID) who are nested within families (FAM).  I want to
model an outcome variable, and take account of the intercorrelation of
individuals within each family. 
 
I think this amounts to two random effects, one nested within the other.
 
How can I model this in R?
 
So far I have tried using the library(nlme), and then
 
Y~ID, random=~1|ID*FAM, 
 
But this isn't working.. 
 
Thanks 
 
Philip

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