I could not find a package in R about Treatment Effect Analysis. 


So is there a R package about Treatment Effect Analysis?

This means, estimating the average treatment effect, average treatment effect on the treated using different methods, including algorithms such as k-nearest-neighbour matching, caliper-matching and things like that?

I found single packages about k-nearest neighbour matching and matching itself (e.g. [matching][1] of [FNN][2]), but I could not find a comprehensive package about treatment effect analysis.


  [1]: http://cran.r-project.org/web/packages/Matching/Matching.pdf
  [2]: http://cran.r-project.org/web/packages/FNN/FNN.pdf