The R Journal: article published in 2009, volume 1:2

copas: An R package for Fitting the Copas Selection Model PDF download
J. Carpenter, G. Rücker and G. Schwarzer , The R Journal (2009) 1:2, pages 31-36.

This article describes the R package copas which is an add-on package to the R package meta. The R package copas can be used to fit the Copas selection model to adjust for bias in meta-analysis. A clinical example is used to illustrate fitting and interpreting the Copas selection model.

CRAN packages: copas, meta
CRAN Task Views implied by cited CRAN packages: ClinicalTrials, MetaAnalysis

  author = {J. Carpenter and G. Rücker and G. Schwarzer},
  title = {{copas: An R package for Fitting the Copas Selection Model}},
  year = {2009},
  journal = {{The R Journal}},
  doi = {10.32614/RJ-2009-012},
  url = {},
  pages = {31--36},
  volume = {1},
  number = {2}