Here is one of their graphs, normalized and aligned for when the authors so classified (by them) appeared and their change in sales figures inferred from Amazon rankings. They also cite an interesting academic study of whether used book sales cannibalize new book sales on Amazon, which finds they rarely do.
Monday, February 18, 2008
Colbert Bump for Books
I love this type of real world data analysis: Juice Analytics has done some data mining on book sales following author appearances on the Colbert Report, and finds that the more liberal folks get a bigger sales bump! Surprise!