Sparse Bayesian Causal Forests for Heterogeneous Treatment Effects Estimation

This paper develops a sparsity-inducing version of Bayesian Causal Forests, a recently proposed nonparametric causal regression model that employs Bayesian Additive Regression Trees and is specifically designed to estimate heterogeneous treatment effects using observational data. The sparsity-inducing component we introduce is motivated by empirical studies where the number of pre-treatment covariates available is non-negligible, leading to different degrees of sparsity underlying the surfaces of interest in the estimation of individual treatment effects... (read more)

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