10.7910/DVN/SWMWX8Ansolabehere, StephenStephenAnsolabehereHarvard UniversitySchaffner, BrianBrianSchaffnerUniversity of Massachusetts, AmherstHarvard Dataverse2017Social SciencesSalazar, ElizabethElizabethSalazarHarvard UniversityAdd your team name(s) here. Add the University name here.PolimetrixCCESHarvard University and MIT2015-06-242018-03-2114530288851377text/tab-separated-valuesapplication/pdf2.0CC0 1.02015 Cooperative Congressional Election Study Common Content data and questionnaire.