Dear all,
thank you for the useful input.
I agree with Jeroen about the fact that those model parts that describe
most of variance in the most plausible manner should be introduced first.
In fact, I can think of a couple of situations in my not so long
experience, in which the inclusion of a
Paolo,
I would not comment on the philosophical issues of brushing teeth, but
the examples that you refer may have different explanations.
In both examples, if the effect of a covariate was not taken into
account, there was no observable (identifiable) inter-occasion
variability. Then you
