Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
| From | brendan.halpin@ul.ie (Brendan Halpin) |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Interpretation of the estimates obtained by the -xtprobit- command |
| Date | Thu, 29 Mar 2012 14:31:03 +0100 |
On Thu, Mar 29 2012, Yuval Arbel wrote: > 4. I also ran the command -xtlogit- with the -fe- option (attached > below). The algorithm omitted many panels and I got the following > message: > > note: multiple positive outcomes within groups encountered. > note: 7307 groups (18043 obs) dropped because of all positive or > all negative outcomes. For the xtlogit question: where for certain individuals the outcome is always 1 or always 0, the fixed effect for that individual predicts the outcome perfectly. That implies a log-odds-ratio of +/- infinity, which Stata's various *logit commands correctly refuse to estimate (and cope by dropping the observations). Re the xtprobit question: see e.g. http://www.stata.com/statalist/archive/2008-09/msg01081.html Brendan -- Brendan Halpin, Department of Sociology, University of Limerick, Ireland Tel: w +353-61-213147 f +353-61-202569 h +353-61-338562; Room F1-009 x 3147 mailto:brendan.halpin@ul.ie ULSociology on Facebook: http://on.fb.me/fjIK9t http://teaching.sociology.ul.ie/bhalpin/wordpress twitter:@ULSociology * * 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/