greek_data is a fictional data set from Table 2.2 in Chapter 2 of Causal Inference. From the book: "Table 2.2 shows the data from our heart transplant randomized study. Besides data on treatment A (1 if the individual received a transplant, 0 otherwise) and outcome Y (1 if the individual died, 0 otherwise), Table 2.2 also contains data on the prognostic factor L (1 if the individual was in critical condition, 0 otherwise), which we measured before treatment was assigned."
A data frame with 20 rows and 4 variables:
The name of a Greek god
A prognostic factor
The treatment, a heart transplant
The outcome, death
Hernán and Robins. Causal Inference. https://www.hsph.harvard.edu/miguel-hernan/causal-inference-book/