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| From | Ye SUN <sunye74stata@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | st: What should I do if stata can not show the result of nbreg |
| Date | Sun, 8 Jan 2012 16:24:51 +0800 |
Dear all My dependent variable is count number: the number of boards that a director serves in (this kind of data seems not fit to poisson) I first try poisson regression and get the results and then I try -estat gof- to test whether there is overdispersion problem, it is insignificant indicating no overdispersion problem I think. I also try -zip- and get similar results, and vuong test indicates there is no excess zero problems I think. I also want to try negative binomial regression,( nbreg and zinb ), but stata run for quite a long time and still run without showing any results. What does that mean? Dose it mean that nbreg is inappropriate here? I want to ask, if -estat gof- after -poisson- shows the insignificant results, can I say this poisson model is OK and do not need to provide negative binomial regression results? Thanks for your help! SUN Ye * * 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/