Likelihood request: zero-truncated negative binomial

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Andrew

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Jun 8, 2026, 9:39:42 AMJun 8
to R-inla discussion group
Hi all,

I am hoping to implement a ZT Negative Binomial or equivalently ZT Poisson-gamma mixture model using inlabru/INLA. 

For context, i have count data that appear to be overdispersed where zero values are not possible.

It doesn't seem to be listed under names(inla.models()$likelihood). Would it be possible for this likelihood to be added? 

Many thanks,
Andrew

Helpdesk (Haavard Rue)

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Jun 8, 2026, 9:57:05 AMJun 8
to Andrew, R-inla discussion group

you want negative.binomial(y | y > 0) ?
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