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RE: st: regression with dependent variable ranging from 0 to 1


From   "Feiveson, Alan H. (JSC-SK311)" <Alan.H.Feiveson@nasa.gov>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: regression with dependent variable ranging from 0 to 1
Date   Tue, 30 Dec 2008 13:20:11 -0600

Andrea - How many exact zeros do you have? This looks like a mixed
discrete-continuous distribution, requiring something like a
zero-inflated model. Also, do you have repeated measures; i.e. is there
a clustering variable involved here?

Al Feiveson

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Andrea
Rispoli
Sent: Tuesday, December 30, 2008 1:05 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: regression with dependent variable ranging from 0 to 1

It is an Herfindahl index of concentration, it ranges from 0 to 1 (in
principle) : in my specific case:

Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
 H         |    213620    .0190621    .0920916          0   .6477536


On Tue, Dec 30, 2008 at 7:17 PM, SR Millis <srmillis@yahoo.com> wrote:
> Andrea,
>
> What exactly is your dependent variable?  What does it purport to
measure?
>
> SR Millis
>
>
> --- On Tue, 12/30/08, Andrea Rispoli <andrea.rspl@gmail.com> wrote:
>
>> From: Andrea Rispoli <andrea.rspl@gmail.com>
>> Subject: Re: st: regression with dependent variable ranging from 0 to

>> 1
>> To: statalist@hsphsun2.harvard.edu
>> Date: Tuesday, December 30, 2008, 12:47 PM Thank you. I tried this 
>> but I reach a message which says "Hessian has become unstable or 
>> asymmetric data not suitable for non-standard family-link 
>> combination".
>> Maybe I should mention that my dependent variable is continuous.
>> Is there anything I could do?
>> Thank you
>> AR
>
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