[R] AIC on GLMM pscl package

[Ben Bolker]

Caribu <hugoazina <at> gmail.com> writes:

> 
> Hello,
> 
> I'm using GLMM on the pscl package and i'm not getting the AIC on the
> summary. 
> 

 [snip]

 glmmPQL is in the MASS package, not the pscl package.
 Because it uses a quasi-likelihood approach, it does not
provide an AIC value (which technically does not exist in this
case).  It is in principle possible to get a "quasi-AIC",
but it is (a) delicate to define and (b) moderately challenging
to extract the information from glmmPQL.

  Ben Bolker