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Image Credit: Arxiv

Amortized Inference of Causal Models via Conditional Fixed-Point Iterations

  • Structural Causal Models (SCMs) help reason about interventions and support out-of-distribution generalization in scientific discovery.
  • Learning SCMs from observed data is challenging, typically necessitating a separate model for each dataset.
  • This work introduces amortized inference of SCMs by training a single model on multiple datasets from different SCMs.
  • A transformer-based architecture is used for learning dataset embeddings, followed by extending the Fixed-Point Approach (FiP) for SCM inference based on dataset embeddings.
  • The proposed method enables the generation of observational and interventional data from new SCMs during inference without parameter updates.
  • Empirical results demonstrate the performance of the amortized procedure against baselines, showing competitive results on in and out-of-distribution problems and outperforming them with limited data.

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