Hi; I intend to make a 3-way interaction using the "Proc Genmod". For this purpose, I made the following variables: EPU: a categorical variable which takes the value of 1,2 or 3 and I made it using a continuous variable. M2CAT: a categorical variable which takes the value of 1,2 or 3 and I made it using a continuous variable. MM: a continuous variable. The model is as follow: proc genmoddata=rr; class fyear sic2 ; model capas= epu|mm|m2cat C1 C2 C3 C4 sic2; repeated subject=fyear ; store capascont; run; When I run the model, it shows the degree of freedom (DF)=1 for EPU and M2CAT. It has caused me a problem since it doesn't show me the interaction of each category with my continuous variable and it seems that SAS treats these categorical variables as a continuous variable. I tried to change the format using the PROC FORMAT but the results stay the same. The problem remains even when I use PROC GLM instead of proc Genmod: proc glm=rr; class fyear sic2 ; model capas= epu|mm|m2cat C1 C2 C3 C4 sic2; run; I would be grateful if you could help me with this. Thanks
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