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st: heckman selection model with endogenous covariates

From   "Rao, James" <>
To   <>
Subject   st: heckman selection model with endogenous covariates
Date   Thu, 8 Apr 2010 11:13:19 +0200

Dear users,

Am interested in estimating a lbor demand equation as follows:

ln_labor=alpha + b1_X + b2_treatment

Since some respondents do not use hired labor, i specify the probability of
using hired labor as:

prob(labor)=b3_Z + b4_treatment

and then estimate the two equations jointly following heckman selection

My concern is that the treatment variable in  both equations is potentially
endogenous. Anyone with an idea of how I can address this potential
endogeneity within the framework of heckman selection models?

Rao E.O. James (Msc)
Research Associate/PhD Student

Department of Agricultural Economics and Rural Development
Georg-August University of Göttingen
Platz der Gottinger Sieben 5
37073 Göttingen, Germany.
Tell:+49-551-394443 (Office)

Courage is not the absence of fear but the triumph over it ... so fear not to
fear ... but strive to overcome fear!

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