A couple of months ago, I became aware of an organization called Publication Integrity and Ethics (PIE). In three posts (1,2,3) I explored some interesting facts about this group, and about a related organization, Open Access Publishing London (OAPL). PIE say that their mission is to "promote and maintain a better and a healthier publishing environment through a new set of ethical rules and guidelines". OAPL, who manage some 50 academic journals, say that they were "the first global publishing house to adopt the PIE Guidelines." ...They are also the only global publishing house whose Director is a relative of PIE's Director. Now, the PIE Guidelines are very clear on the issue of 'duplicate publication':