This repository is preserved for archival purposes only, and is not under active maintenance. It has replication scripts for experiments from:

Stefan Wager and Susan Athey. Estimation and Inference of Heterogeneous Treatment Effects using Random Forests. 2015. [arxiv]

For anyone wanting to use causal forests, please see the causal_forest function in https://github.com/swager/grf. This function is more efficiently implemented, has multi-core support, and has also demonstrated better statistical performance.