What do CPL branch libraries have in common?

As we finish our omnibus white paper on the project, some maps and visualizations have been augmented to include the latest book seasons and recolored to show the branch clusters and checkouts per book. We’ve also excerpted some of the explanation.

 

 

In order to create Figure C, we performed unsupervised clustering of the branches based on their demographic characteristics. We used the Partitioning Around Medioids (PAM) algorithm [Kaufman 1990], which is known to be more robust to noise and outliers compared to the more widely-used k-means algorithm. PAM is more computationally-intensiveRead more

Circulation Model Updated for 2016 Season

Our multi-level model for One Book circulation has been updated to include data for the 2016 OBOC season, Barbara Kingsolver’s “Animal, Vegetable, Miracle”. Interestingly, as a non-fiction work, the book proves to be very similar in its circulation pattern to two fictional works: “The Adventures of Augie March” and “The Amazing Adventures of Kavalier and Clay”.

The second (tan) bars in each group below (marked AV) reflects the interaction between the AV circulation and three demographic components. Augie March is orange; Kavalier and Clay,… Read more