count.pairings

a vector of treatment indicators. Must contain exactly 2 distinct values, one for treated and one for control.

a vector of categories of a potential blocking variable. Must be the same length as argument <code>z</code>.

exact

Given a treatment indicator and a potential blocking variable, counts the number of allowed treatment-control pairings in the whole match within blocks of the proposed variable.

Tools for large, sparse optimal matching of treated units
and control units in observational studies. Provisions are
made for refined covariate balance constraints, which include
fine and near-fine balance as special cases. Matches are
optimal in the sense that they are computed as solutions to
network optimization problems rather than greedy algorithms.
See Pimentel, et al.(2015) <doi:10.1080/01621459.2014.997879>
and Pimentel (2016), Obs. Studies 2(1):4-23. The rrelaxiv
package, which provides an alternative solver for
the underlying network flow problems, carries an
academic license and is not available on CRAN, but
may be downloaded from Github at
<https://github.com/josherrickson/rrelaxiv/>.

count.pairings: Count treatment-control pairings.

Description

Usage

Arguments

Value