Causal Covariate Shift Correction using Fisher information penalty

Behraj Khan; Behroz Mirza; Tahir Syed

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arXiv · 2502.15756

Causal Covariate Shift Correction using Fisher information penalty

Behraj Khan·Behroz Mirza·Tahir Syed

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Abstract

Evolving feature densities across batches of training data bias cross-validation, making model selection and assessment unreliable (\cite{sugiyama2012machine}). This work takes a distributed density estimation angle to the training setting where data are temporally distributed. \textit{Causal Covariate Shift Correction ($C^{3}$)}, accumulates knowledge about the data density of a training batch using Fisher Information, and using it to penalize the loss in all subsequent batches. The penalty improves accuracy by $12.9\%$ over the full-dataset baseline, by $20.3\%$ accuracy at maximum in batchwise and $5.9\%$ at minimum in foldwise benchmarks.

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BibTeX RIS

Behraj Khan, Behroz Mirza, Tahir Syed. 2025-02-11. Causal Covariate Shift Correction using Fisher information penalty. https://arxiv.org/abs/2502.15756

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