Walmart sales model: Stacking Regressor vs linear baseline

01Data Science

A lightweight comparison of a stacked ensemble against a strong linear baseline, including where complexity helped—and where it didn't.

Mar · 261 min read53 words

🛒Story Companion // ML Model Stacking vs. Baseline

Stacking Ensemble

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Walmart Sales Forecasting

Linear Model vs. Stacked Regressor

Baseline

Linear OLS

Simple & Fast

Challenger

Stacked Meta

Higher Accuracy

Start with the simplest model that can't embarrass you, then earn complexity.

I used a linear baseline to establish a clean reference point, then tested a stacking regressor to see if non-linearity actually mattered.

The ensemble improved specific seasonal segments, but the baseline won overall maintainability. That trade-off is often the right answer.

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