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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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