I know this was asked and answered in 2005, I just want to make sure the
answer still holds in 2010.
Question:
If I have the mixed-model with
lmer( y ~ x1 + x2 + (1 | id) + (z1 | w ) , ... )
there is no way for me to specify a correlation structure for the random
effects? Right?
If I want to specify correlation structure then I need to use lme in the
nlme package? Right? Crossed Random effects are coded with the pdBlocked
syntax? Right?
Thanks,
-tgs
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