This report is a collaborative effort based on the input and analysis of the following individuals:

Primary Researchers
Courtney Kennedy, Director, Survey Research
Andrew Mercer, Research Methodologist
Scott Keeter, Senior Survey Advisor
Nick Hatley, Research Assistant
Kyley McGeeney, Research Methodologist
Alejandra Gimenez, Intern  

Collaborating Researchers
Claudia Deane, Vice President, Research
Samantha Smith, Research Assistant
Andrew Perrin, Research Assistant
Ruth Igielnik, Research Associate
Amanda Lee, Intern
Yanna Yan, Intern

Editorial and Graphic Design
Michael Keegan, Information Graphics Designer
Bill Webster, Information Graphics Designer
David Kent, Copy Editor

Communications and Web Publishing
Rachel Weisel, Communications Associate
Travis Mitchell, Digital Producer

We would like to thank the vendors who took the time to meet with us and discuss their sample methodologies. Their input was tremendously helpful to this study. We would also like to thank Mike Brick, Nancy Mathiowetz, Jon Cohen and Sarah Cho, each of whom was very helpful in the early phases of this research. While their contributions were invaluable, Pew Research Center is solely responsible for the interpretation and reporting of the data.