When are time series predictions causal? The potential system and dynamic causal effects

Jacob Carlson and Neil Shephard

Papers from arXiv.org

Abstract: The potential system is a nonparametric time series model for assessing the causal impact of moving an assignment at time $t$ on an outcome at future time $t+h$, accounting for the presence of features. The potential system provides nonparametric content for, e.g., time series experiments, time series regression, local projection, impulse response functions and SVARs. It closes a gap between time series causality and nonparametric cross-sectional causal methods, and provides a foundation for many new methods which have causal content.

Date: 2026-03
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