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Re: st: Correction for sample bias

From   "Stephen P. Jenkins" <>
Subject   Re: st: Correction for sample bias
Date   Wed, 23 Oct 2002 14:27:58 +0100 (GMT Daylight Time)

On Wed, 23 Oct 2002 14:19:20 +0100 Axel Heitmueller 
<> wrote:

> Hi there,
> I've got a limited dependent variable (0,1) problem and suspect 
> some sample bias in my data. In the case of continues dependent 
> variables there are several ways to correct for this problem (e.g. 
> tobin models). However, does anyone know how to deal with a 
> case like this were both, the main regression equation and the bias 
> correction equation (the one that comes up with Heckman's 
> lambda) have limited dependent variables? Is there some literature 
> on this problem or even a way to estimate the regression in stata?

Try -help heckprob-

Professor Stephen P. Jenkins <>
Institute for Social and Economic Research (ISER)
University of Essex, Colchester, CO4 3SQ, UK
Tel: +44 (0)1206 873374. Fax: +44 (0)1206 873151.

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