mr.genius implements GENIUS-MAWII. Reference: Ting Ye, Zhonghua Liu, Baoluo Sun, and Eric Tchetgen Tchetgen (2021). GENIUS-MAWII: For Robust Mendelian Randomization with Many Weak Invalid Instruments. Available at https://arxiv.org/abs/2107.06238.
To install the most up-to-date version, run the following command in R
library(devtools)
install_github("tye27/mr.genius")