Your question begins, Dear Dr. Bates, yet Bates does not appear as
an addressee in the copy of your question that I recieved via r-help. I
will offer a couple of suggestions in the hopes that they might help
you. Since your question did not include enough detail for anyone to
Dear Dr. Bates,
Thank you very much for your response. I had consulted
the algorithm described in Pinheiro and Bates.
However, what I don't understand (among other things)
is why my two parameters appear to be estimated at
different grouping levels (based on the DF values).
Affect this different
