Counterfactual and Synthetic Control Method: Causal Inference with Instrumented Principal Component Analysis
Published in Working Paper, 2024
The fundamental problem of causal inference lies in the absence of counterfactual. In recent advances, researchers modelling the entire data generating process (DGP) to impute the missing counterfactual explicitly. This paper expands the interactive fixed effect (IFE) model by instrumenting covariates into factor loadings adding additional robustness.