Welcome to the bcf site! This page provides hands-on examples of how to conduct Bayesian causal forest (BCF) analyses. You can find methodological details on the underlying modeling approach in the original BCF paper: Hahn, Murray, and Carvalho 2017.

BCF is a cutting-edge causal inference methodology that builds on Bayesian Additive Regression Trees (BART, Chipman, George, and McCulloch 2010). Specifically, it applies BART to causal inference (Hill 2011). BART and BCF both combine Bayesian regularization with regression trees to provide a highly flexible response surface that, thanks to the Bayesian regularizing priors, does not overfit to the training data. BCF extends BART's flexibility by specifying different models for relationships between (1) covariates and the outcome and (2) covariates and the treatment effect.

BCF performs remarkably well in simulation and has led the pack at recent rigorous causal inference competitions, such as those held at the Atlantic Causal Inference Conference (see, for example, Dorie et al. 2019).

If you are just getting started with bcf, we recommend beginning with the tutorial vignettes on the "Articles" page of this website.

This package requires compilation, so make sure you have Rtools properly installed -- see this site for details.

Install the latest release from CRAN:

install.packages("bcf")

Install the latest development version from GitHub:

if (!require("devtools")) {
  install.packages("devtools")
}
devtools::install_github("jaredsmurray/bcf")