zackrcheng / alt-data-consumer-signals Star 1 Code Issues Pull requests Multi-pillar L/S equity research on DoorDash (DASH): alt-data signals → GOV surprise forecast → revenue / contribution-margin / EBITDA chain → DASH-vs-UBER cross-sectional spread → CAR event study. Pre-registered Q1 2026 prediction. uber scikit-learn pandas lasso statsmodels instacart ridge event-study doordash food-delivery wrds ubereats quantitative-research equity-research walk-forward-validation long-short-equity alt-data consumer-discretionary pre-registered-research Updated May 6, 2026 Jupyter Notebook