Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
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 17:06:08 +0000
Dear Statalisters,
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
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/