search for: aods3

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2015 Jun 25
1
Estimating overdispersion when using glm for count and binomial data
Dear All I recently proposed a simple modification to Wedderburn's 1974 estimate of overdispersion for count and binomial data, which is used in glm for the quasipoisson and quasibinomial families (see the reference below). Although my motivation for the modification arose from considering sparse data, it will be almost identical to Wedderburn's estimate when the data are not sparse.
2015 Jun 26
0
Estimating overdispersion when using glm for count and binomial data
Ben Bolker writes: > This looks really useful. Base R is very conservative; despite the > fact that it would be much more easily adopted in base R, I think it > is much more likely to find a home in an add-on package such as aods3 > or glm2 than in base R ... Thanks for these suggestions Ben - Simon Wood has also been in touch, and plans to put it into mgcv David Fletcher Original post: I recently proposed a simple modification to Wedderburn's 1974 estimate of overdispersion for count and binomial data, which is...