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

[Jeff Newmiller]

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Sent from my phone. Please excuse my brevity.

On August 16, 2017 6:17:03 AM PDT, 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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