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jzhang332002
Fluorite | Level 6

I am doing a logistic regression across a class variable "state", and the parameter always set the last state, for example, "WY"'s value as 0. I want my sample average parameters across all state to be 0. That means no state's final parameter is 0, but their average is 0. Is there a way to do it? Thanks.

2 REPLIES 2
Rick_SAS
SAS Super FREQ

You can use the PARAM= keyword on the CLASS statement to set the parameterization for the classification variables.  Here are all the parameterizations: SAS/STAT(R) 13.1 User's Guide  By default, PROC LOGISTIC uses PARAM=EFFECT. Parameter estimates for the effect coding scheme "estimate the difference in the effect of each nonreference level compared to the average effect over all levels."   I am a little confused because it sounds like that is what you want, right? A comparison to the average?

Questions like this are best asked in the Statistical Procedures Community. Some of the experts there (like or ) would be able to give a more definitive answer.

lvm
Rhodochrosite | Level 12 lvm
Rhodochrosite | Level 12

I don't think you want the average parameters to be 0. I think you want param=effect or param=ref.

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