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Re: st: nbreg vs zinb


From   clivelists@googlemail.com
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: nbreg vs zinb
Date   Wed, 14 Mar 2012 18:03:18 +0000

You've now been on the list long enough not to scatter about names and years that aren't fully referenced. Read the Statalist FAQ again if you're not sure. Going by most of your posts, using a spellchecker wouldn't go amiss, either...

C

-----Original Message-----
From: Muhammad Anees <anees@aneconomist.com>
Sender: owner-statalist@hsphsun2.harvard.edu
Date: Wed, 14 Mar 2012 22:42:20 
To: <statalist@hsphsun2.harvard.edu>
Reply-To: statalist@hsphsun2.harvard.eduSubject: Re: st: nbreg vs zinb

I would prefer NB model. You? I suggest read the Long and Freese notes
carefully.

Anees

On Wed, Mar 14, 2012 at 8:23 PM, Simon Falck <simon.falck@abe.kth.se> wrote:
> Dear Statlist,
>
> I´m regressing the number of start-ups, using count data.
>
> The data is clearly not Poisson.
>
> Hence, I am using nbreg and zinb models. I have some concern regarding what is the most appropriate model in my situation. Both seem relevant.
>
> Using the Long/Freese command, accordingly: countfit $dept $xlist, maxcount(10) nbreg zinb
>
> The Tests and Fit Statistics indicate that both nb and zinb may be preferred if BIC, AIC and Voung is consulted, although p>0.05.
>
> -------------------------------------------------------------------------
> NBRM           BIC= -2071.543          AIC=     2.714       Prefer  Over      Evidence
> -------------------------------------------------------------------------
>  vs ZINB      BIC= -2046.607            dif=   -24.935     NBRM    ZINB     Very strong
>                      AIC=     2.720                 dif=    -0.005        NBRM    ZINB
>                      Vuong=   1.292            prob=    0.098     ZINB      NBRM  p=0.098
>
> What would be your suggestion regarding choice of model in my situation?
>
> Thanks in advance,
> /Simon
>
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-- 

Best
---------------------------
Muhammad Anees
Assistant Professor/Programme Coordinator
COMSATS Institute of Information Technology
Attock 43600, Pakistan
http://www.aneconomist.com

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