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cem

Authors: Stefano Iacus, Gary King, Giuseppe Porro

This R package is designed to improve the estimation of causal effects via an extremely powerful method of matching that is widely applicable and exceptionally easy to understand and use (if you understand how to draw a histogram, you will understand this method). The program implements the Coarsened Exact Matching (CEM) algorithm described in:

Stefano M. Iacus, Gary King, and Giuseppe Porro, "Causal Inference Without Balance Checking: Coarsened Exact Matching" and "Multivariate Matching Methods That are Monotonic Imbalance Bounding".

For more information, see package website at:

http://gking.harvard.edu/cem

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Version

Install

install.packages('cem')

Monthly Downloads

3,882

Version

1.1.17

License

GPL-2

Maintainer

Stefano Gary King

Last Published

December 5th, 2016

Functions in cem (1.1.17)

shift.cem

Diagnostic tool for CEM
LeLonde

Modified Lalonde dataset
imbalance

Calculates several imbalance measures
combine.spacegraphs

Combine two spacegraph objects.
DW

Dehejia-Wahba dataset
pscoreSelect

Heuristic search of the best propensity score model specification
LLvsPSID

Lalonde treated units versus PSID control individuals
relax.cem

Diagnostic tool for CEM
L1.meas

Evaluates L1 distance between multidimensional histograms
LL

Lalonde dataset
cemspace

Exploration tool for CEM
pair

Produces a paired sample out of a CEM match solution
att

Example of ATT estimation from CEM output
cem

Coarsened Exact Matching
imbspace.plot

Plot of imbalance space diagnostic tool for CEM
L1.profile

Calculates L1 distance for different coarsenings
spacegraph

Randomly compute many different matching solutions
imbspace

Diagnostic tool for CEM
search.match

Heuristic search of match solutions
k2k

Reduction to k2k Matching