Hi,
I'm looking for pointers/references on calculating den DF's for fixed effects when using crossed random effects. Also, is there an implementation of simulate.lme that I could use in lme4?
Thanks,
Elizabeth Lynch
Douglas Bates wrote:
Alexandre Galv�o Patriota wrote:
Hi, I'm having some problems regarding the packages lme4 and nlme, more specifically in the denominator degrees of freedom. <SNIP>
The lme4 package is under development and only has a stub for the code that calculates the denominator degrees of freedom.
These Wald-type tests using the F and t distributions are approximations at best. In that sense there is no "correct" degrees of freedom. I think the more accurate tests may end up being the restricted likelihood ratio tests that Greg Reinsel and his student Mr. Ahn were working on at the time of Greg's death.
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