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st: Instrument Validity tests for Heckman 1979
From
"Kyrizi, Andri" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: Instrument Validity tests for Heckman 1979
Date
Mon, 10 Mar 2014 15:12:51 +0000
Dear Statlisters,
I would like to test the validity of my instruments after using the Heckman's (1979) two-step sample selection model. In particular I want to correct for the selectivity bias for using only employed individuals.
I've searched everywhere to find a way to test them but could't find anything. I am aware that a topic on 'diagnostics for the treatreg procedure' exists but I don't think it relates to my question.
I would really appreciate any guidance you could give me!
Many thanks,
Andri
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