Bivariate Causal Discovery for Categorical Data via Classification with Optimal Label Permutation.

ABSTRACT: Causal discovery for quantitative data has been extensively studied but less is known for categorical data. We propose a novel causal model for categorical data based on a new classification model, termed classification with optimal label permutation (COLP). By design, COLP is a parsimonious classifier, which gives rise to a provably identifiable causal model. A simple learning algorithm via comparing likelihood functions of causal and anti-causal models suffices to learn the causal direction. Through experiments with synthetic and real data, we demonstrate the favorable performance of the proposed COLP-based causal model compared to state-of-the-art methods. We also make available an accompanying R package COLP, which contains the proposed causal discovery algorithm and a benchmark datase

SUBMITTER: Ni Y 

PROVIDER: S-EPMC10686288 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature