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From   Ayse Akincigil <>
To   "''" <>
Subject   st: SVYHECKMAN
Date   Mon, 18 Aug 2003 16:23:52 -0400

Has anyone experimented with the new survey versions of heckman and

I can not estimate the standard errors with SVYHECKMAN.

When I ran Heckman ignoring the survey design, stata does provide the
estimates for standard errors. However, in the first few iterations, the log
likelihood is not concave.

Thank you
Ayse Akincigil
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