parse data.
I am happy to give more details if needed.
David Fletcher
Department of Mathematics and Statistics
University of Otago
Dunedin
New Zealand
D.J. Fletcher (2012) Estimating overdispersion when fitting a
generalized linear model to sparse data. Biometrika 99:230–237
(http://biomet.oxf
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 used in glm for
the quasipoisson and quasibinomial families (se