log of offset for Poisson?

Hi:

I am pretty sure that I need to take the log of the offset variable when
fitting a Poisson model using glmer, but I was hoping someone might be
kind enough to confirm this.

Thanks,

Yes.  Offsets are added on the scale of the linear predictor.

  When in doubt about this sort of thing, make up a little simulated
example for yourself and see whether you recover the right answer.

  Ben Bolker