Noteworthy points: 1. The period spanned -- 2005-2013 -- covers the big boom in ebook self-publishing that Amazon precipitated by making it easy to self-publis

Noteworthy points: 1. The period spanned -- 2005-2013 -- covers the big boom in ebook self-publishing that Amazon precipitated by making it easy to self-publish. A lot of self-published authors make very little money, so this may skew the figures. (Increased supply.) 2. The ALCS survey polled both professionally published and self-published authors (it was open to the public).