Re: [R] likelihoods in SAS GENMOD vs R glm

2007-03-19 Thread Brian S Cade
Ave., Bldg. C Fort Collins, CO 80526-8818 email: [EMAIL PROTECTED] tel: 970 226-9326 Brian S Cade <[EMAIL PROTECTED]> Sent by: [EMAIL PROTECTED] 03/19/2007 08:06 AM To r-help@stat.math.ethz.ch cc Subject [R] likelihoods in SAS GENMOD vs R glm List: I'm helping a colleagu

[R] likelihoods in SAS GENMOD vs R glm

2007-03-19 Thread Brian S Cade
List: I'm helping a colleague with some Poisson regression modeling. He uses SAS proc GENMOD and I'm using glm() in R. Note on the SAS and R output below that our estimates, standard errors, and deviances are identical but what we get for likelihoods differs considerably. I'm assuming that