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arXiv · 2411.17542

Causal Inference in Finance: An Expertise-Driven Model for Instrument Variables Identification and Interpretation

Ying Chen·Ziwei Xu·Kotaro Inoue·Ryutaro Ichise
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Abstract

Instrumental Variable (IV) provides a source of treatment randomization that is conditionally independent of the outcomes, responding to the challenges of counterfactual and confounding biases. In finance, IV construction typically relies on pre-designed synthetic IVs, with effectiveness measured by specific algorithms. This classic paradigm cannot be generalized to address broader issues that require more and specific IVs. Therefore, we propose an expertise-driven model (ETE-FinCa) to optimize the source of expertise, instantiate IVs by the expertise concept, and interpret the cause-effect relationship by integrating concept with real economic data. The results show that the feature selection based on causal knowledge graphs improves the classification performance than others, with up to a 11.7% increase in accuracy and a 23.0% increase in F1-score. Furthermore, the high-quality IVs we defined can identify causal relationships between the treatment and outcome variables in the Two-Stage Least Squares Regression model with statistical significance.

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Ying Chen, Ziwei Xu, Kotaro Inoue, Ryutaro Ichise. 2024-11-26. Causal Inference in Finance: An Expertise-Driven Model for Instrument Variables Identification and Interpretation. https://arxiv.org/abs/2411.17542

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