st: Synth (Abadia, Diamond, and Hainmueller) Placebo test graphic

[Charlotte Timmermans <timmermanscharlotte@gmail.com>]

Hello,

I am using the synthetic control method as developed by Abadie,
Diamond and Hainmueller with Stata 12.

I ran the method and got the results for my treated country (The
Congo) and for its synthetic counterpart made from a pool of 21
potential comparison countries.

I am now willing to implement the placebo test to verify the
significance of my results.

Following the synth help page provided by stata, I introduced the
following commands:

tempname resmat
       forvalues i =3D 1/21 {
       synth  rgdpch2  ini_gdp ci  LifeexpectancyBirth2
Populationgrowthannual av_pretreatment_gdp , trunit(`i')
trperiod(1965)
       matrix `resmat' =3D nullmat(`resmat') \ e(RMSPE)
       local names `"`names' `"`i'"'"'
       }
       mat colnames `resmat' =3D "RMSPE"
       mat rownames `resmat' =3D `names'
       matlist `resmat' , row("Treated Unit")

The program applied the SCM to every country in the donnor pool and
got the graph with the RMSPEs
I need to compute the graphic that computes the estimated effect
associated with every placebo run.
( A graph that shows the differences between per capita GDP paths (my
outcome variable) in every one of the 21 countries and their synthetic
counterpart. )
For example, in Abadie, Diamond and Hainmueller's paper about the
Effect of California=92sTobacco Control Program, shows the graph that
computes the placebo tests.

How should I proceed in Stata12 to compute this graphic? I am unable
to find the right comands.

Thank you for your time,

Best Regards.
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