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From | Maarten buis <maartenbuis@yahoo.co.uk> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: St: predicted values in zinb regression |
Date | Fri, 18 Mar 2011 17:55:59 +0000 (GMT) |
--- On Fri, 18/3/11, rachel grant wrote: > I have used the command predict n to generate a set of > predicted Y values after running zinb regression. I have > my predicted values but there are no zeros in the > predicted values at all, although in most cases the > predicted value was very small where a zero should be e.g. > 0.35. Is this OK or have I done something wrong? predict will give you the expected value, which is the probability that an observation falls within the non-0 category times the expected count in that case, and this will not be 0. Hope this helps, Maarten -------------------------- 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/