Hi Fang,

I'm not entirely certain, but I believe the R version is the fastest. And in Stata, you will get a variable called cem_strata that are the strata created by matching so that all of the treated units in those bins are matched to the control units in those bins.

Cheers,

Matt

On Thu, Mar 23, 2017 at 4:34 PM, fang zhang <fazhang2000@hotmail.com> wrote:

Hi All,

          I am really excited about the CEM and want to use it for a lot of future studies. I have two questions:

          1. Which software performs the fastest comparing R, STATA and SAS macro?

          2. I want to get a matched id so that I know which pair (case and control 1to 1 match) are matched together? Is it possible to obtain a data set has that column in the SAS macro or STATA?



          Thanks a lot!

Fang

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