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ylee12
Calcite | Level 5

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

2 REPLIES 2
Ksharp
Super User

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

Or Check RPOC GLIMMIX .

PGStats
Opal | Level 21

To me, robust and exact don't belong in the same sentence, but then, what do I know Smiley Happy? 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.

PG

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