Integrating causal representation learning for adaptation in latent representation space

Develop methods that integrate causal representation learning into semi-supervised domain adaptation to recover latent structure and enable adaptation in representation space, particularly beyond the linear structural causal model setting considered in the paper.

Background

The paper develops semi-supervised domain adaptation (SSDA) methods and theory under anticausal linear structural causal models (SCMs), proposing fine-tuning strategies tailored to specific intervention types and establishing minimax guarantees.

However, many real-world datasets are generated by more complex mechanisms, often involving latent causal variables and nonlinear mixing before observation. In such settings, adaptation may need to be performed in a learned latent representation space rather than directly in the observed space.

The authors explicitly state that connecting SSDA with causal representation learning to recover latent structure and adapt in representation space remains an open challenge, highlighting a gap between current linear-model-based analysis and practice in nonlinear, latent-variable scenarios.