The EC reports in its Official Journal (PDF) that «by jointly switching the sale of ebooks from a wholesale model to an agency model with the same key terms on a global basis, the Four Publishers and Apple engaged in a concerted practice with the object of raising retail prices of ebooks in the EEA [European Economic Area, which includes the 27 countries in the European Union plus Iceland, Norway and Liechtenstein],» breaching EEA competition rules. (gigaom.com)
The anti-trust lawsuit stemmed from claims there «was a conspiracy involving three of the nation's top publishers and others to fix and raise retail prices of eBooks.» (readersentertainment.com)
The usual process is to set a wholesale price based on a discount off the suggested retail price of the ebook or the printed book equivalent (expect smaller discounts than you're used to). (activitypress.com)