RCT2

Provides various statistical methods for designing and analyzing two-stage randomized controlled trials using the methods developed by Imai, Jiang, and Malani (2021) doi:10.1080/01621459.2020.1775612 and (2022+) doi:10.48550/arXiv.2011.07677. The package enables the estimation of direct and spillover effects, conduct hypotheses tests, and conduct sample size calculation for two-stage randomized controlled trials.