To install the latest version of paramed from github enter the below command. This version is currently not available on SSC:

To install first uninstall any previous versoins of paramed, then use net install to install paramed from github:

ssc uninstall paramed

net install paramed, from("https://raw.githubusercontent.com/GForb/paramed/master")

If you already have paramed installed you must uninstall it first with uninstall. Do not use the net install replace option. If you do not uninstall the version of paramed installed from SSC (for example you use the replace option with net install), Stata will think there are two versions of parmed installed.

Two models are estimated: a model for the mediator conditional on treatment (exposure) and covariates (if specified), and a model for the outcome conditional on treatment (exposure), the mediator and covariates (if specified). It extends statistical mediation analysis (widely known as Baron and Kenny procedure) to allow for the presence of treatment (exposure)-mediator interactions in the outcome regression model using counterfactual definitions of direct and indirect effects.

paramed allows continuous, binary or count outcomes, and continuous or binary mediators, and requires the user to specify an appropriate form for the regression models. paramed provides estimates of the controlled direct effect, the natural direct effect, the natural indirect effect and the total effect with standard errors and confidence intervals derived using the delta method by default, with a bootstrap option also available.