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Synth
- Synthetic Control Methods for Causal Inference in Comparative Case
Studies
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| Synth
(by Alberto Abadie, Alexis Diamond, and Jens
Hainmueller) is a statistical software that implements synthetic
control methods for causal inference in comparative case studies with
aggregate data as developed in
Abadie and Gardeazabal (2003) and Abadie, Diamond, and Hainmueller
(2007). This method allows for causal inference in
observational settings with a single unit (a state, country, firm,
etc.) exposed to an event or intervention. Synth
provides a data-driven procedure to construct adequate controls based
on a weighted combination of potential comparison regions that
approximates the most relevant characteristics of the entities exposed
to the intervention. It produces informative inference regardless of
the number of available comparison units, the number of available time
periods, and whether the data are individual (micro) or aggregate
(macro).
Synth is available for three
programs MATLAB, Stata, and R as alpha versions. Feedback from users is
highly appreciated. If you download the software, please send us an
email at jhainm
(at) fas.harvard.edu
so we can keep you informed about updates. Similarly, if you
use Synth for a
paper please send us a copy as we are trying to compile a
database
of applications. Thank you very much!
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Synth
for Stata (Version 0.0-5)
The easiest way to obtain and
install Synth for Stata is to open Stata and type:
net
from "http://www.people.fas.harvard.edu/~jhainm/Synth"
net describe synth
net install synth, all replace
Alternativley,
you can download the codefiles and documentation as a zip archive here:
stata_synth.zip
Please download, unzip, and follow directions in readme.txt
file.
Notice: Synth is currently only released for Stata running on the
Windows XP operating system. If you want to use Synth on Vista, Mac OS,
or Unix, please send us an email.
A change log
is provided which tracks changes across versions.
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Synth for MATLAB
- Current Version
(zip archive with scripts and example data) |
Synth Package for R (Updated Version 0.1-3)
- Source: Synth_0.1-3.tar.gz
- Windows Binary: Synth_0.1-3.zip
- You can also obtain the Synth package for
R from CRAN by typing:
install.packages("Synth") |
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