Sensitivity of test for overdispersion in Poisson regression

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Sensitivity of test for overdispersion in Poisson regression

Overdispersion or extra-Poisson variation is very common for count data. This phenomenon arises when the variability of the counts greatly exceeds the mean under the Poisson assumption, resulting in substantial bias for the parameter estimates. To detect whether count data are overdispersed in the P...

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Bibliographic Details
Main Authors:	Xiang, Liming, Lee, Andy
Format:	Journal Article
Published:	Wiley-VCH 2005
Subjects:	Perturbations Poisson regression Overdispersion Score test
Online Access:	http://hdl.handle.net/20.500.11937/42652

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