← Chistian Callahan's projects
@ccallahan308by Chistian Callahan · CGC Labs
Pythonchurn-predictioncustomer-segmentationkkboxmachine-learningmkdocs
ecommerce-retention-growth
Churn, LTV segmentation, and win-back ROI on the KKBox/WSDM dataset: calibrated XGBoost (ROC-AUC 0.788 on a fixed-seed 50K-user sample), K-Means LTV segments, retention-budget simulator with synthetic cold-start mode.
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