Adjusting prior probabilities and ROC curve in SAS Eminer

[kerenafK1]

To whom may it concern,

I adjusted prior probabilities accordingly since my modeling data is non-event undersampled, using SAS Eminer 14.1

I noticed that ROC curve is flattened after that. I thought that AROC should not changed by over/undersampling, so I am very confused.

Can you kindly help me to understand?

Many thanks in advance,

Kere

[WendyCzika]

Can you provide some more details about your flow, specifically the model nodes you are using?

[kerenafK1]

Hi!

Thank you for your kind reply. Please find the attachment containing the diagram overlook.