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Tests for Detecting Overdispersion in Poisson Regression Models

✍ Scribed by C. Dean and J. F. Lawless


Book ID
118162734
Publisher
American Statistical Association
Year
1989
Tongue
English
Weight
923 KB
Volume
84
Category
Article
ISSN
0162-1459

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The efficient score test for overdispersion in the Poisson regression model is derived explicitly, and it is shown that by virtue of a particular matrix identity, the test has a surprisingly simple form provided the Poisson regression contains an intercept. It is also pointed out that the test is in