Machine Learning, Causal Inference, Meta Learning, Instruments, Observational Studies.
networks, among others — to estimate the CATE. In this section, we briefly introduce four types of meta-learners, including S-, T-, X-, and R-learners (see Causal ML API documentation). Currently, the S-learner, T-learner, and X-learner algorithms are available in both the CausalML and EconML