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| From | Raphael Fraser <raphael.fraser@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | st: Standard Errors: regress vs. xtreg |
| Date | Mon, 3 Oct 2011 18:13:48 -0400 |
I am fitting the following models expecting to get the same standard errors but they are slightly different. Can some one explain the reason for this? xi, noomit: regress logsize i.days ozone dayXozone if year == 88, noconstant xi, noomit: xtgee logsize i.days ozone dayXozone if year == 88, noconstant corr(independent) Thanks, Raphael * * 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/