Predictions, Lasso Regression, Model Averaging, Spline Regression, Crossvalidation.
These dummies are nothing more than identifiers — for a 2-level factor, you need a single dummy variable containing two levels (0 & 1). In PROC NLMIXED, this then becomes: parameter + (dummy*test variable). Here, the dummy is treatment, implemented at week. And now we model curves, one for each