- A
Cluster-level treatment assignment (0/1), constant within cluster.
- H1
Cluster-level covariate 1.
- H2
Cluster-level covariate 2.
- N
Cluster size recorded on each row (repeats within cluster).
- X1
Individual-level covariate 1 (numeric).
- X2
Individual-level covariate 2 (numeric or binary coded 0/1).
- Y
Observed binary outcome (0/1).
- Y0
Potential outcome under control (0/1).
- Y1
Potential outcome under treatment (0/1).
- cluster_id
Cluster identifier (integer or factor), constant within cluster.