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Re: st: very low log-likelihood value in (intreg)


From   dk <statad27@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: very low log-likelihood value in (intreg)
Date   Wed, 14 Oct 2009 13:05:51 +0200

Respected Maarten,

Thanks for your kind help.  i have some more questions: I am doing
analysis for consumers willingness to pay (WTP) using double bounded
contingent valuation method (CVM). i have used sample N= 80, and i
have 4 subgroups of 20 each. i want to use intreg for this subgroups,
is it possible to use intreg to get mean WTP. i have tried but got
very small  log-likelihood value of -8.34 as i said. Is it fine to use
it and how many independent variables i should use. or what other
method i should use.


i know that i am asking too many questions, but i do not have any
option. yours help will be great help for me.


Thanking you,



On Wed, Oct 14, 2009 at 9:32 AM, Maarten buis <maartenbuis@yahoo.co.uk> wrote:
> --- On Tue, 13/10/09, dk wrote:
>> Can i use interval regression(intreg) for N= 18. i tried to
>> use it and got - 8.3467 log-likelihood value, is it fine if
>> we get this low value.
>
> With only 18 observations I wouldn't do anything other than
> simple describtive statistics, I might do a normal regression
> -regress- with one or maybe two explanatory variables, but
> I wouldn't do anything more complex like -intreg-. Having
> said that, I don't think that a log-likelihood of -8 is an
> exceptionaly small number for a log likelihood, even with
> only 18 observations.
>
> Hope this helps,
> Maarten
>
> --------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
>
> http://www.maartenbuis.nl
> --------------------------
>
>
>
>
>
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