Retraction notice: Dependence structure of the US dollar index and crude oil prices: a regime-switching copula approach

The publisher of Journal of Financial Economic Policy wishes to retract the article Badwan N., Al-Khazaleh S., Qubbaj I. and Bani Ahmad A.Y. (2025), “Dependence structure of the US dollar index and crude oil prices: a regime-switching copula approach”, Journal of Financial Economic Policy, Vol. ahead-of-print No. ahead-of-print. Link to Dependence structure of the US dollar index and crude oil prices: a regime-switching copula approachLink to the cited article. It has come to our attention that a large portion of this article is taken, without full and proper attribution, from an earlier work by Wang, Y. and Ding, X. (2024) Dependence Structure of the US Dollar Index and Crude Oil Prices: A Regime-Switching Copula Approach. Journal of Mathematical Finance, 14, 172–189, doi: Link to Dependence Structure of the US Dollar Index and Crude Oil Prices: A Regime-Switching Copula ApproachLink to the cited article. The submission guidelines for Journal of Financial Economic Policy make it clear that articles must be original and not infringe any existing copyright. The decision to retract has been informed by COPE’s guidelines on retractions and Emerald’s publishing ethics. The authors cooperated with the investigation but failed to provide a satisfactory explanation to these concerns. The authors of this article would like to note that they do not agree with the content of this notice. The publisher of the journal sincerely apologizes to the readers.