Peer Reviewed Documentation
More general discussion of methodology can be found in the following peer-reviewed academic articles.
On online surveys as opposed to phone and mail:
Stephen Ansolabehere and Brian Schaffner. 2014. "Does Survey Mode Still Matter? Findings from a 2010 Multi-Mode Comparison." Political Analysis. 22(3): 285–303.
On the cooperative structure of the CCES:
Stephen Ansolabehere and Douglas Rivers. 2013. "Cooperative Survey Research." Annual Review of Political Science. 16(1): 307-329.
On the voter validation:
Stephen Ansolabehere and Eitan Hersh. 2012. "Validation: What Big Data Reveal About Survey Misreporting and the Real Electorate." Political Analysis. 20(4): 437-459.