Kobo evidently are doing some analysis on completion rates, and published a report last year aimed at publishers using analysis based on similar metrics: http:

Kobo evidently are doing some analysis on completion rates, and published a report last year aimed at publishers using analysis based on similar metrics: http://cafe.kobo.com/_ir/159/20149/Publishing%20in%20the%20Era%20of%20Big%20Data%20-%20Kobo%20Whitepaper%20Fall%202014.pdf http://cafe.kobo.com/_ir/159/20149/Publishing%20in%20the%20E... Further numbers into completion rates split by region and genre also from Kobo made their way into this nytimes article earlier in the year: http://www.nytimes.com/2015/02/05/arts/international/keeping-tabs-on-best-seller-books-and-reading-habits.html http://www.nytimes.com/2015/02/05/arts/international/keeping... I'd be interested in the raw data, particularly also from Amazon based on Kindle ebook read completion though I imagine that won't get shared.