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Open Access

Expression of Concern

Expression of Concern: Modified Liu estimators in the linear regression model: An application to Tobacco data

  • The PLOS One Editors

The PLOS One Editors issue this Expression of Concern to alert readers that this article [1] was identified as one of a series of submissions for which we have concerns about adherence to the journal’s authorship policy. We regret that these issues were not addressed prior to the article’s publication.

Reference

  1. 1. Babar I, Ayed H, Chand S, Suhail M, Khan YA, Marzouki R. Modified Liu estimators in the linear regression model: An application to Tobacco data. PLoS One. 2021;16(11):e0259991. pmid:34807916

Citation: The PLOS One Editors (2026) Expression of Concern: Modified Liu estimators in the linear regression model: An application to Tobacco data. PLoS One 21(3): e0343789. https://doi.org/10.1371/journal.pone.0343789

Published: March 2, 2026

Copyright: © 2026 The PLOS One Editors. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.