tightenBlock:Tightens an Observational Block Design by Balanced Subset
Matching
Tightens an observational block design into a smaller design with either smaller or fewer blocks while controlling
for covariates. The method uses fine balance, optimal subset
matching (Rosenbaum, 2012 <doi:10.1198/jcgs.2011.09219>) and
two-criteria matching (Zhang et al 2023
<doi:10.1080/01621459.2021.1981337>). The main function is
tighten(). The suggested 'rrelaxiv' package for solving
minimum cost flow problems: (i) derives from Bertsekas and
Tseng (1988) <doi:10.1007/BF02288322>, (ii) is not available on
CRAN due to its academic license, (iii) may be downloaded from
GitHub at <https://github.com/josherrickson/rrelaxiv/>, (iv) is
not essential to use the package.
