topic Re: Exact Poisson Regression with Robust Variance in SAS in Statistical Procedures

Exact Poisson Regression with Robust Variance in SAS

ylee12 — Tue, 27 Feb 2018 04:38:18 GMT

Is it possible to fit exact Poisson regression with robust variance in SAS?

Re: Exact Poisson Regression with Robust Variance in SAS

Ksharp — Tue, 27 Feb 2018 12:35:02 GMT

PROC GENMOD can do Exact Poisson Ression, but not sure if it is Robust Variance.

Or Check RPOC GLIMMIX .

Re: Exact Poisson Regression with Robust Variance in SAS

PGStats — Wed, 28 Feb 2018 05:30:28 GMT

To me, robust and exact don't belong in the same sentence, but then, what do I know ? Genmod does exact Poisson regression. Countreg (in SAS/ETS) doesn't, but gives you more options to model the variance. Check the Conway-Maxwell-Poisson distribution option.