Copas’ method is sensitive to different mechanisms of publication bias

Osama Almalik, Zhuozhao Zhan and Edwin R. van den Heuvel

Statistics & Probability Letters, 2023, vol. 194, issue C

Abstract: Copas’ method corrects a pooled estimate from an aggregated data meta-analysis for publication bias. Its performance has been studied for one particular mechanism of publication bias. We show through simulations that Copas’ method is not robust against other realistic mechanisms. This questions the usefulness of Copas’ method, since publication bias mechanisms are typically unknown in practice.

Keywords: Copas’ selection model; Meta-analysis; Publication bias (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1016/j.spl.2022.109733

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