arXiv Statistics ML By Gonzalo Mateos, Samuel Rey, Hamed Ajorlou, Mariano Tepper

Concomitant DAG Learning: On the Roles of Noise Adaptivity, Sparsity, and Non-negativity

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The article discusses recent advances in learning directed acyclic graphs (DAGs) from observational data, highlighting the challenges of enforcing acyclicity and dealing with latent confounding or heterogeneous noise. It reviews the evolution from combinatorial search methods to continuous, score‑based approaches that use smooth acyclicity constraints, and introduces concomitant DAG estimation techniques that jointly infer sparse causal structure and exogenous noise levels to improve robustness under heteroscedasticity and distribution shifts. The tutorial also outlines future research directions such as online, nonlinear, and neural causal discovery.

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