[R] betareg question - keeping the mean fixed?

[Achim Zeileis]

On Mon, 5 Sep 2011, Bettina Gruen wrote:

> On 09/02/2011 07:20 PM, betty_d wrote:
>> Thanks for your response, that does work, however, it is still not quite 
>> what
>> want. I would like to tell betareg what the mean is (in my case, 0.5) and
>> force it to use that value. Is this possible?
>
> AFAIK package betareg currently does not allow you to fix the mean and only 
> estimate the precision parameters.

That is also my impression. When I wrote the code, I had in mind that 
there should be at least one parameter to estimate in each of the 
components (mean/precision). I'll have a look if that can be changed 
easily.

Best,
Z

> Best,
> Bettina
>
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> Institut für Angewandte Statistik / IFAS
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