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st: Correction for sample bias

From   "Axel Heitmueller" <>
Subject   st: Correction for sample bias
Date   Wed, 23 Oct 2002 14:19:20 +0100

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?



Axel Heitmueller, 
Centre for Economic Reform and Transformation, CERT
School of Management
Heriot-Watt University
EH14 4AS
phone +44(0)131 451 3969
fax +44 (0)131 451 3296
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