RETRACTED: Investigating the efficiency in oil futures market based on GMDH approach

  • Authors:
  • Mohsen Mehrara;Ali Moeini;Mehdi Ahrari;Ali Erfanifard

  • Affiliations:
  • Faculty of Economics, University of Tehran, Kargar-e-Shomali, Tehran, Iran;Department of Algorithms and Computation, Faculty of Engineering, University of Tehran, Tehran, Iran;Faculty of Economics, University of Tehran, Kargar-e-Shomali, Tehran, Iran;Faculty of Economics, University of Tehran, Kargar-e-Shomali, Tehran, Iran

  • Venue:
  • Expert Systems with Applications: An International Journal
  • Year:
  • 2009

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Abstract

This article has been retracted at the request of the Editor-in-Chief. Please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). Reason: This article has copied material previously published in the article ''Are there exploitable inefficiencies in the futures market for oil?'', Shambora et. al., Energ. Econ., 29 (2007) 18-27, doi:10.1016/j.eneco.2005.09.004. As such, this article represents a severe abuse of the scientific publishing system and a clear violation of publishing ethics, and therefore must be retracted.