Displaying 2 results from an estimated 2 matches for "veral".
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vera
2006 Jul 10
2
about overdispersed poisson model
Dear R users
I have been looking for functions that can deal with overdispersed poisson
models. According to actuarial literature (England & Verall, Stochastic Claims
Reserving in General Insurance , Institute of Actiuaries 2002) this can be handled through the
use of quasi likelihoods instead of normal likelihoods. However, we see them frequently
in this type of data, and we would like to be able to fit the model anyway.
If it is possible,...
2003 Jan 16
3
Overdispersed poisson - negative observation
Dear R users
I have been looking for functions that can deal with overdispersed poisson
models. Some (one) of the observations are negative. According to actuarial
literature (England & Verall, Stochastic Claims Reserving in General
Insurance , Institute of Actiuaries 2002) this can be handled through the
use of quasi likelihoods instead of normal likelihoods. The presence of
negatives is not normal in a poisson model, however, we see them frequently
in this type of data, and we would l...