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Reporting overdispersion for NB regre... |
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Good morning Professors Muthen, and good mornign Mplus community. Trying to comfort reviewers i'm trying to explain that my outcome variable is overdispersed and NB regression is a better choice than Poisson. Could you please tell me how can I report the Dispersion result found in NB regression? Estimate 10.774 SE 1.396 Est / SE 7.718 two tailed p. 0.000 Also is it appropriate to report AIC/BIC model fits from NB and Poisson? Is there a (syntax) way to compare two models and numerically show one fits better than the other? I'd be very helpful for any hints on this. Thank you |
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When the dispersion is significantly different from zero, it is needed. Yes, AIC/BIC is fine - as with all ML analysis. If you want a test that one model is significantly better, the two models should be nested, e.g. by one model having several of the other model's slope parameters fixed at zero - you can then do a regular LRT chi-2 test. |
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