[R] Deviance of zeroinfl/hurdle models

cfarmer carson.farmer at gmail.com
Wed Jul 20 03:05:30 CEST 2011

bbolker wrote:
>     What about 
> library(pscl)
> example(hurdle)
> -2*logLik(fm_hnb2) 
>  ?

Should this not be -2*(logLik(M) - logLik(S)) where M is the current model
and S is the saturated or full model? In which case, is it safe to assume
that L(S) = 0? Or have I got my deviances crossed?


Carson J. Q. Farmer
Doctoral Fellow
National Centre for Geocomputation
National University of Ireland, Maynooth
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