An intriguing factoid from WSJ coverage of Amazon.com’s impressive quarterly numbers:
Amazon has also broadened its offerings with its own products, such as the Kindle ebook reader. But the company has struggled to meet demand for the device, which sold out quickly each of the past two holiday seasons.
Mr. Bezos said the Kindle was driving incremental book sales. "When people buy a Kindle, they continue to buy the same number of physical books going forward as they did before they owned a Kindle. Incrementally, they buy 1.6 to 1.7 Kindle books for every physical book that they buy."