Brad DeLong : "If I Had Not Known the Topic of the Paper, I Would Have Thought This Was a Map of the Obama Vote Share in 2012"

http://delong.typepad.com/sdj/2013/03/if-i-had-not-known-the-topic-of-the-paper-i-would-have-thought-this-was-a-map-of-the-obama-vote-share-in-2012.html