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st: test for rho=0 in Heckman two-step procedure?
From
Michael Boehm <[email protected]>
To
[email protected]
Subject
st: test for rho=0 in Heckman two-step procedure?
Date
Wed, 17 Feb 2010 20:18:59 +0000
Dear all,
when I run the "heckman depvar [indepvars], select(varlist_s) twostep"
command I do not get a test for rho=0 (no correlation between errors
in the selection and the main equation) - contrary to the ML version
without the [twostep] option. I also do not find an option that
provides this test and couldn't find anything on a google search.
Can someone help?
Michael
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