Digital vs. print: New study shows playing favorites can hurt sales
To ensure the increasing popularity of e-books did not undermine the success of their printed counterparts, publishers frequently delayed the digital publication date for several weeks after the print edition has been released. However, new research in the INFORMS journal Management Science found that delaying the sale of the e-version of a new book does not lead to increased print sales, and can result in significantly fewer e-book sales once the digital version is made available.