[R] cross-classified random factors in lme without blocking

[Douglas Bates]

Douglas Bates <bates at cs.wisc.edu> writes:

...
> I realize that it is awkward to use lme to fit models with crossed
> random effects.  As Saikat DebRoy and I described in a recent preprint
>         http://www.stat.wisc.edu/~bates/reports/MultiComp.pdf
> we now have a good handle on the computational methods for
> mixed-effects models with nested or crossed or partially crossed
> random effects.

That URL should have been
        http://www.stat.wisc.edu/~bates/reports/MixedComp.pdf