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st: Re: RE: fixed effect logit model


From   "Levy Lee" <chtl@econ.hku.hk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: RE: fixed effect logit model
Date   Wed, 27 Oct 2004 17:07:46 +0800

thanks a lot
i will read those chapters
----- Original Message ----- 
From: <Anna-Cristina.DADDIO-DEVAUX@oecd.org>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, October 27, 2004 4:40 PM
Subject: st: RE: fixed effect logit model


> The short answer to your first question is because this is the nature of
the
> FE logit model.
> Indeed it only uses observation that switch from one period to the other
(1
> to 0) or (0 to 1).
> A comprehensive survey of fixed effects panel data models is in Honoré
> (2002). Or you can look at
> Chamberlain, G. (1985): "Heterogeneity, Omitted Variable Bias, and
Duration
> Dependence,"
> in Longitudinal Analysis of Labor Market Data, ed. by J. J. Heckman, and
B.
> Singer, no. 10
> 41in Econometric Society Monographs series,, pp. 3-38. Cambridge
University
> Press, Cambridge,
> New York and Sydney.
> anna
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Levy Lee
> Sent: 27 October 2004 10:28
> To: statalist@hsphsun2.harvard.edu
> Subject: st: fixed effect logit model
>
>
> Dear Statalister,
>
>    Just a quick and maybe naive question, why the sample size shrinked
when i
> estimate a fixed effect logit model using an unbalanced panel dataset?
>
>    the question goes like this:
>
>    i firstly estimate estimate an ordinary pulled data logit model with a
> three year panel of 3107 observations for 1241 firms. when i tried the
fixed
> model, the observation number dropped to 1045 observations, which only
> captured 427 firms. can you tell me why?
>
> also, why these is no a similar xtprobit model for fixed effect?
>
> thanks
>
> Levy
>
>
>
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