Causality, Causal Inference, Backdoor, Frontdoor, Instrumental Variable.
df[unlist(greedymatch[c(“index.treated”, “index.control”)]),] t.test(matched$y[matched$x == 1],matched$y[matched$x == 0], paired = TRUE) When using this method we get b_direct_match = 1.05, which is very close to what we observed when using the covariates method. 4.3 Propensity Score Matching If