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Score Tests for Heterogeneity and Overdispersion in Zero-Inflated Poisson and Binomial Regression Models

✍ Scribed by Daniel B. Hall and Kenneth S. Berenhaut

Book ID
111851093
Publisher
John Wiley and Sons
Year
2002
Tongue
French
Weight
914 KB
Volume
30
Category
Article
ISSN
0319-5724

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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