Causal Inference: What If. Figure 8.6 Posted on October 24, 2021March 26, 2022 By Tim Watkins Adapted from Figure 8.6 Reference Hernán MA, Robins JM (2020). Causal Inference: What If. Boca Raton: Chapman & Hall/CRC. https://www.hsph.harvard.edu/miguel-hernan/causal-inference-book/ Selection bias