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Sambit Mishra

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#machine learning Preprint Aug 2026

Causal Discovery in Equal Variance Linear Gaussian DAGs via SURE-Tuned Ridge Regression

This work proposes SURE-Ridge, a non-iterative, closed-form estimator for equal variance linear Gaussian SEM, which achieves the lowest structural Hamming distance in the small-sample regime and the lowest run time across all sample sizes tested, compared with NOTEARS, DAGMA, and GBNSL baselines.

Sambit Mishra, Urbashi Mitra · 0 citations