1. How populist are the people? Measuring populist attitudes in voters;Akkerman;Comparative Political Studies,2014
2. American National Election Studies (ANES) 2012 User's guide and codebook for the ANES 2012 time-series study Ann Arbor, MI/Palo Alto, CA Univeristy of Michigan/Stanford University
3. Ansolabehere , S. 2010 CCES common content, 2010 http://hdl.handle.net/1902.1/17705
4. Who wants to have a Tea Party? The who, what and why of the Tea Party movement;Arceneaux;PS,2012