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Re: st: ml with a parameter between 0.07 and 1


From   Beatrice Crozza <beatrice.crozza@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: ml with a parameter between 0.07 and 1
Date   Thu, 25 Mar 2010 12:57:39 +0000

Dear Maarten and Paul,

thank you very much.

Bea

2010/3/24 E. Paul Wileyto <epw@mail.med.upenn.edu>:
> gen double `am'=0.07+(1-0.07)/(1+exp(-`a'))
>
>
>
> Beatrice Crozza wrote:
>>
>> Dear all,
>>
>> I did a maximum likelihood and I constrained one parameter to be
>> between zero and one, in this way:
>>
>> gen double `am'=1/(1+exp(-`a'))
>>
>> and then I generated the standard error using the delta method.
>>
>> Now I want to constrain the parameter to be between 0.07 and 1.
>>
>> How can I do this?
>>
>> Thank you very much
>>
>> Best,
>> Bea
>> *
>> *   For searches and help try:
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>> *   http://www.ats.ucla.edu/stat/stata/
>>
>>
>
> --
> E. Paul Wileyto, Ph.D.
> Assistant Professor of Biostatistics
> Tobacco Use Research Center
> School of Medicine, U. of Pennsylvania
> 3535 Market Street, Suite 4100
> Philadelphia, PA  19104-3309
>
> 215-746-7147
> Fax: 215-746-7140
> epw@mail.med.upenn.edu
> *
> *   For searches and help try:
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> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>

*
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