Political Orientation from Amazon “Also Bought” Patterns
Wednesday, January 2nd, 2008via TechPresident
I’m getting ready to do a little politically oriented…or maybe “aware” is a better term….blogging for 2008. I recently subscribed to the TechPresident blog and came across this recent post that I thought would be of interest to the librarians out there.

from orgnet.com
Network visualization shows patterns of political book purchases prior to the 2008 U.S. presidential primaries. Books are linked by Amazon’s “also bought” data — only top-sellers are shown. Two distinct clusters emerge from the data, with a few books bridging the divide, similar to 2004.
I’d like to know a little more about the methodology here, especially how the “top sellers” represented were selected. By my count the “blues” read more different titles (about 29) than the reds (about 23). Do the blues read more than the reds…or should I say “buy” more, who knows if these get read or not. And i presume that the buyers weren’t just buying political books, but buying other reading as well…wonder if you can get a sense of political orientation from whether you bought the Sunday’s at Moosewood Restaurant Cookbook or the Barbecue Bible. My reading list wouldn’t be a good example since I believe in the old maxim to “keep friends close but your enemies closer.”
Hmmmm….I wonder if you could do something similar using WorldCat holdings information….are America’s public libraries blue or red?






