Synthetic Matching Method for Returns R package synthReturn version 1.0.0 Implements the revised Synthetic Matching Algorithm of Kreitmeir, Lane, and Raschky (2025) <doi:10.2139/ssrn.3751162>, building on the original approach of Acemoglu, Johnson, Kermani, Kwak, and Mitton (2016) <doi:10.1016/j.jfineco.2015.10.001>, to estimate the cumulative treatment effect of an event on treated firms’ stock returns. Software Depends: R (>= 4.0) Imports: base (>= 4.0.0), stats, utils, corpcor (>= 1.6.10), data.table, quadprog (>= 1.5), parallel, mirai Suggests: knitr, rmarkdown, testthat (>= 3.0.0) David H Kreitmeir <david.kreitmeir1@monash.edu> Comprehensive R Archive Network (CRAN) David H Kreitmeir [aut, cre], Christian Düben [ctb] MIT + file LICENSE (https://CRAN.R-project.org/package=synthReturn/LICENSE) 2025-09-08 application/tgz https://CRAN.R-project.org/package=synthReturn doi:10.32614/CRAN.package.synthReturn