Can any one suggest the suitable r-package to calculate difference-in-differences for RCT dataset?

07 July 2015 0 10K Report

I have baseline and 6 month follow up data and i would like to calculate pre difference, post difference and DiD with out and with propensity score matching (PSM). I got the r-packages for PSM for observation study but i am not able to find for two time data.

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