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From | "Michael Palmer" <Michael.Palmer@anu.edu.au> |
To | <statalist@hsphsun2.harvard.edu> |
Subject | RE: st: FW: Marginal effects for the two-part model |
Date | Thu, 3 Feb 2011 16:49:08 +1100 |
Thanks for the clarification! Mills' not Mill's - mental note. There seems to be some confusion on the computation of marginal effects for the TPM I described as some authors still suggest combined marginal effects. This paper for example distinguishes the Heckit model and its inverse Mills' ratio from the TPM yet presents combined marginal effect calculations in both instances: http://www.springerlink.com/content/h07u7807486673r8/ Cheers, Michael Michael Palmer PhD Candidate National Centre for Epidemiology and Population Health The Australian National University Ph. 6125 0538 M. 0437 867 940 -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Maarten buis Sent: Thursday, 3 February 2011 2:19 AM To: statalist@hsphsun2.harvard.edu Subject: RE: st: FW: Marginal effects for the two-part model --- On Wed, 2/2/11, Maarten buis wrote: > The difference between that and your two-part model is that in that > model the dependence is included by deriving the inverse Mill's ratio > from the selection model, add it to the OLS model, and adjust the > standard errors. Nick is in a pedantic mood today(*). He correctly pointed out to me privately that it is Mills' ratio and not Mill's ratio. (And the moment he told me, I remembered that he made that point before, and at that time I made a mental note not to make that mistake... <http://www.stata.com/statalist/archive/2008-02/msg00945.html>) -- Maarten (*) but see the entry on pedantry in this glossary: <http://www.stata.com/statalist/archive/2011-01/msg00003.html> -------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- * * 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/ * * 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/