# mediation (for R) mediation is a publicly available R package that allows both parametric and nonparametric causal mediation analysis. It implements the methods and suggestions in **Imai, Keele, and Yamamoto (2010)** and **Imai, Keele, and Tingley (2010)**. The package won the 2015 PolMeth Statistical Software Award. In addition to the estimation of causal mediation effects, the software also allows researchers to conduct sensitivity analysis for certain parametric models. Regardless of one's operating system, the software can be installed by typing the following command at R prompt:> install.packages("mediation") This will install the latest version from [**CRAN**](http://cran.r-project.org/). Please make sure that your R is up to date too. The latest version of mediation is version 4.0, and you will need R 2.14. The package is also at the CRAN repository . For extensive discussion and details on use, see Imai, Keele, Tingley and Yamamoto (2010).***Teppei Yamamoto. (2010).*** Filed under:- [ Softwear ](/resource/softwear)