Federated Average Treatment Effect Estimation Across Studies

Client-side 'DataSHIELD' package that orchestrates the federated estimation of the average treatment effect (ATE) across multiple independent randomised controlled trials (RCTs), each held on a separate data server. Implements in a federated way the g-formula estimator from Khellaf, Bellet and Josse (2025) "Federated Causal Inference: Multi-Study ATE Estimation beyond Meta-Analysis" , including variance estimation and optional adjustment for study-specific intercept shifts.