1. The Disappearing Center: Engaged Citizens, Polarization, and American Democracy;Abramowitz,2010
2. “The big sort” that wasn't: a skeptical reexamination;Abrams;PS Political Sci. Polit.,2012
3. Purple America;Ansolabehere;Polit. Behav.,2006
4. What's the matter with “What's the matter with Kansas?;Bartels;Quarterly Journal of Poltical Science,2006
5. The Big Sort: Why the Clustering of Like-Minded America Is Tearing Us Apart;Bishop,2008