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st: Heckprob - Why no margins in selection equation?
From
James McJoseph <[email protected]>
To
[email protected]
Subject
st: Heckprob - Why no margins in selection equation?
Date
Tue, 30 Nov 2010 14:45:28 +0200
Dear Statalist
Could someone enlighten me plse. I use stata 11. I estimated Heckprob. I
requested "margins, dydx(_all)". Stata gives me margins for the obejective
equation only. For the selection equation, it gives "missing". Why?
James
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