Synth Package
Synth
is a statistical software that implements
synthetic control methods for causal inference
in comparative case studies with aggregate
data as described in Abadie
and Gardeazabal (2003) and Abadie,
Diamond, and Hainmueller(2010). An
detailed explanation of the Synth package
for R is presented in Abadie,Diamond,
and Hainmueller (2011).
The synthetic control method allows for effect
estimation in settings where a single unit (a
state, country, firm, etc.) is exposed to an
event or intervention. It provides a
data-driven procedure to construct synthetic
control units based on a weighted combination
of comparison units that approximates the
characteristics of the unit that is exposed to
the intervention. A combination of comparison
units often provides a better comparison for
the unit exposed to the intervention than any
comparison unit alone.
Synth is
available for MATLAB, Stata, and R. Feedback
from users is appreciated. If you download
the software, please send us an email so that we can keep
you informed about updates. If you
encounter a problem with the software
please first check the FAQ and if
you cannot find your answer there please
send us an email with your
question.
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Synth for Stata
Before
installing Synth, please make sure that
your Stata is up to date (ie.
type update
all on the Stata command prompt).
To
install Synth for Stata type:
net from
"http://www.mit.edu/~jhainm/Synth"
net describe synth
net install synth, all replace
force
Notice:
Synth for Stata
runs on Stata versions 9-12 (32 and 64
bit), but contains a platform dependent
plugin. Net install will automatically
copy the correct version of the plugin
to your computer. Currently, plugin
versions are included for Windows
platforms (XP,
Vista, and 7) for 32 and 64
bit Stata, Mac platforms (OS
X on x86-32, x86-64, PPC-32 and PPc-64) for Stata 32 or 64 bi, and
Unix/Linux platforms
for 32 bit Stata. If a plugin is not
availbale for your platform, you will
receive an error message during the
installation. In this case you can
email us and we can send you the C
code to compile the plugin on your
platform.
Thanks to Daniel
Bjorkegren for compiling the plugins for
Mac and to Ethan Scherer for compiling
the plugin for Unix.
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Synth
for MATLAB
- Current
Version
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Synth
Package for R
- To obtain the Synth
package for R from CRAN typing:
install.packages("Synth")
- Source: http://cran.r-project.org/web/packages/Synth/index.html
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