[R] {nlme} Question about modeling Level two heteroscedasticity in HLM

[Bert Gunter]

A better place for this post would be on R's mixed models list:
r-sig-mixed-models  .

Cheers,
Bert


Bert Gunter

"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Wed, Aug 16, 2017 at 6:17 AM,  <b88207001 at ntu.edu.tw> wrote:
> Hello dear uesRs,
>
> I am working on modeling both level one and level two heteroscedasticity in
> HLM. In my model, both error variance and variance of random intercept /
> random slope are affected by some level two variables.
>
> I found that nlme is able to model heteroscedasticity. I learned how to use
> it for level one heteroscedasticity but don't know how to use it to model
> the level two heteroscedasticity. I wonder if anyone could give me some
> guide how to do it or any suggested software / packages if nlme is unable to
> do it.
>
> Many thanks in advance!
>
> Best,
> Yen
>
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