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Copas’ method is sensitive to different mechanisms of publication bias

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

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.

Suggested Citation

  • Almalik, Osama & Zhan, Zhuozhao & van den Heuvel, Edwin R., 2023. "Copas’ method is sensitive to different mechanisms of publication bias," Statistics & Probability Letters, Elsevier, vol. 194(C).
    • Handle: RePEc:eee:stapro:v:194:y:2023:i:c:s0167715222002462
    DOI: 10.1016/j.spl.2022.109733
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    References listed on IDEAS

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    1. Sue Duval & Richard Tweedie, 2000. "Trim and Fill: A Simple Funnel-Plot–Based Method of Testing and Adjusting for Publication Bias in Meta-Analysis," Biometrics, The International Biometric Society, vol. 56(2), pages 455-463, June.
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