Published: 15 November 2017
Author(s): Giuseppe Romano, Diego Bellavia, Francesco Clemenza
Issue: January 2021
Section: Review

The Publisher regrets that this article is an accidental duplication of an article that has already been published, http://dx.doi.org/10.1016/j.ejim.2017.09.016. The duplicate article has therefore been withdrawn.The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal.

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