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| From | "a.carrozzone@libero.it" <a.carrozzone@libero.it> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | st: heckman model |
| Date | Mon, 17 Jan 2011 15:37:36 +0100 (CET) |
Dear Stata users, I have a doubt regarding the Heckman procedure (heckman command). Why is the estimate of rho different than the estimated coefficient of lambda? Is rho here defined as the correlation coefficient between the estimated residuals of the two equations? Thanks a lot, Andrea * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/