Rhino: Deep Causal Temporal Relationship Learning With History-dependent Noise

• URL: http://arxiv.org/abs/2210.14706v1
• Date: Wed, 26 Oct 2022 13:33:58 GMT
• Title: Rhino: Deep Causal Temporal Relationship Learning With History-dependent Noise
• Authors: Wenbo Gong, Joel Jennings, Cheng Zhang and Nick Pawlowski
• Abstract summary: We propose a novel causal relationship learning framework for time-series data, called Rhino. Rhino combines vector auto-regression, deep learning and variational inference to model non-linear relationships with instantaneous effects. Theoretically, we prove the structural identifiability of Rhino.
• Score: 13.709618907099783
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Discovering causal relationships between different variables from time series data has been a long-standing challenge for many domains such as climate science, finance, and healthcare. Given the complexity of real-world relationships and the nature of observations in discrete time, causal discovery methods need to consider non-linear relations between variables, instantaneous effects and history-dependent noise (the change of noise distribution due to past actions). However, previous works do not offer a solution addressing all these problems together. In this paper, we propose a novel causal relationship learning framework for time-series data, called Rhino, which combines vector auto-regression, deep learning and variational inference to model non-linear relationships with instantaneous effects while allowing the noise distribution to be modulated by historical observations. Theoretically, we prove the structural identifiability of Rhino. Our empirical results from extensive synthetic experiments and two real-world benchmarks demonstrate better discovery performance compared to relevant baselines, with ablation studies revealing its robustness under model misspecification.

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