This report was made possible by The Pew Charitable Trusts. Pew Research Center is a subsidiary of The Pew Charitable Trusts, its primary funder.
This report is a collaborative effort based on the input and analysis of the following individuals:
Research team
Ruth Igielnik, Research Associate Scott Keeter, Senior Survey Advisor Courtney Kennedy, Director, Survey Research Bradley Spahn, Stanford University Nick Hatley Research Analyst Arnold Lau, Research Analyst Andrew Mercer, Senior Research Methodologist Nick Bertoni Panel Manager Elliott Morris, University of Texas
Communications and editorial
Rachel Weisel, Communications Manager Hannah Klein, Communications Associate Travis Mitchell, Digital Producer, Copy Editor David Kent, Copy Editor
Graphic design
Bill Webster, Information Graphics Designer
Colleagues from across Pew Research Center contributed greatly to the development and execution of this report. We would especially like to thank Claudia Deane, Michael Dimock and Jocelyn Kiley for their editorial contributions. In addition, several practitioners and other experts provided helpful guidance and advice, including Whit Ayres, David Becker, Kevin Collins, Ken Goldstein, Hannah Hartig, Eitan Hersh, Dan Judy, Jon McHenry and Bill McInturff.
We offer special thanks to staff from the five voter file vendors who helped us better understand their products and cheerfully and patiently responded to our numerous questions and requests.
