st: heckman decomposition

[ncdcta00@uniroma2.it]

Dear statalist,
I need to calculate the decomposition oaxaca after heckman selection.

I use heckman two step, first I run a probit and after  I calculated  
the regression with the lambda as an independent variable.

I want to calculate the effect of selection separate than remuneration  
and endowment  effects, but with the command decompose I can't.
Do you know how I can calculate the selection effect?
thanks in advance.
Best,
c. n.

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