Is Declining Ebook Revenue Related to Publisher-Amazon Feud?

Several publishers have made headlines over the past few years as they battled for the right to set their own ebook prices. wanted to contractually obligate the companies to set the prices at $9.99 or less. Big-name authors got involved, as did Stephen Colbert-whose publisher, Hachette, was in one of the longest and most contentious contract negotiations with Amazon (which, for its part, tossed its weight around by taking pre-order buttons off of Hachette books, and purposely filling books for Hachette books late). But Hachette and other publishers, like Harper-Collins and Simon & Schuster-as well as the rest of the so-called Big 5-eventually won the right to set their own prices. But as the Wall Street Journal points outin E-Book Sales Fall After New Amazon Contracts, that may be coming back to haunt the companies now, which have seen their ebook revenue fall.