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| From | Richard Williams <Williams.NDA@comcast.net> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: re: margeff/margins discrepancy |
| Date | Sun, 25 Apr 2010 14:34:35 -0500 |
At 10:35 AM 4/25/2010, Kit Baum wrote:
<>Joanne's problem arises because in the code for Bartus' margeff, version 2.2.0 of 20 Aug 2009 (on SSC),the line > > qui replace `touse'=1 > > // Calculation of partial effects and standard errorscauses the information in the `touse' indicator, which points to the selected cases (78/2246 in the example Joanne gave) to be lost. Lower down, a calculation like
Good catch. I had noticed that margeff and margins tended to give results that were close but not quite the same. I attributed that to differences in their approaches. But, once you get the sample selection right, it appears the two give identical results.
------------------------------------------- Richard Williams, Notre Dame Dept of Sociology OFFICE: (574)631-6668, (574)631-6463 HOME: (574)289-5227 EMAIL: Richard.A.Williams.5@ND.Edu WWW: http://www.nd.edu/~rwilliam * * 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/