1. Raymond J. La Raja & Brian F. Schaffner , Do Party-Centered Campaign Finance Laws Increase Funding for Moderates and Challengers? 19–20 (Jan. 8–11, 2014)
2. Nolan McCarty et al., Polarized America: The Dance of Ideology and Unequal Riches 162 ( 2006 )
3. Stephen Ansolabehere et al., Why Is There So Little Money in U.S. Politics? , J. Econ. Persp., Winter 2013, at 105 , 109
4. Chris Tausanovitch & Christopher Warshaw , Measuring Constituent Policy Preferences in Congress, State Legislatures, and Cities , 75 J. Pol. 330 , 331 ( 2013 )
5. Michael Barber & Nolan McCarty , Causes and Consequences of Polarization, in Solutions to Polarization in America 31