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| From | Patrick Roland <patrick.rolande@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | st: margeff and margins puzzle |
| Date | Thu, 28 Jul 2011 16:35:37 -0700 |
Hi all, Here's a piece of code which gives peculiar results. It's a simple probit. "margeff" calculates the marginal effect to be exactly zero, whereas margins (correctly) doesn't. The really puzzling thing is that if "set obs 1000" is changed to "set obs 100", they give identical results, as they should! Anyone have any idea what might be going on here? set seed 1 set obs 1000 gen x0 = -.25 gen x1 = runiform() gen eps = rnormal() gen y = x0+x1+eps > 0 probit y x1 margeff margins, dydx(*) * * 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/