Request: "xnbinomial" likelihood for non-integer counts

[bolis...@gmail.com]

Hi,

Similar to the implementation of xbinomial (see https://groups.google.com/g/r-inla-discussion-group/c/FLpdv5jB90w/m/kSwlgxb9AgAJ), would it be possible to add xnbinomial to support the use of non-integer counts for survey-weighted data?

Many thanks,

Oli.

[Helpdesk (Haavard Rue)]

that is doable. I'm back at KAUST next week.

bare in mind, that the 'size' or 'dispersion' parameter, kind of looses its
meaning since the likelihood is no longer normalized for continous response. so
I do not know what `it is' anymore.

with this, do you know what benefite that neg.binom has compared to xpoisson ?
if you add a iid effect using poisson, you essentially get back the
neg.binomial, can you use the same trick for the 'xpoisson' to mimic xnbinom ?

Best
H

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