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From |
jhilbe@aol.com |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Subject: Re: st: What should I do if stata can not show the result of nbreg |

Date |
Mon, 9 Jan 2012 10:54:01 -0500 (EST) |

Ye SUN/Maarten:

I try -estat gof- to test whether there is overdispersion problem, it

is

insignificant indicating no overdispersion problem I think.

Joseph Hilbe ----------------------------- Date: Sun, 8 Jan 2012 15:44:01 +0100 From: Maarten Buis <maartenlbuis@gmail.com>

On Sun, Jan 8, 2012 at 9:24 AM, Ye SUN wrote:

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?

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