I would like to analyze the results of allowing negative variance as part
of a simulation study, to understand if and how the negative variance cases
differ from the convergent cases.

If there is no way to do so already written, does anyone have an idea how I
might alter the code to allow negative variance estimates?

Thanks,

Rachel Baird


On Tue, Jun 4, 2013 at 11:46 AM, Douglas Bates <bates@stat.wisc.edu> wrote:

> On Tue, Jun 4, 2013 at 9:01 AM, Callie Baird <calliebaird@gmail.com>wrote:
>
>> I am trying to fit multilevel models, allowing negative variance
>> estimates.
>>  Is there a way to allow negative variance estimates as in nobound in SAS?
>>
>
> No, and I, for one, am not likely to add it.  See
>
> install.packages("fortunes")
> library(fortunes)
> fortune("impossibility")
>
>

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