This report was written by Jeffrey S. Passel, senior demographer, and D’Vera Cohn, senior writer/editor. Editorial guidance was provided by James Bell, vice president of global strategy; Mark Hugo Lopez, director of Hispanic research; and Claudia Deane, vice president, research. Antonio Flores, Gustavo López and Jynnah Radford, research assistants, created charts and tables; number-checked the text, graphics and interactive maps; and assisted with formatting and production. Michael Keegan, information graphics designer, created the maps used in this report and developed some of its charts. Danielle Alberti, web developer, developed the interactive versions of maps and tables that accompany this report. David Kent was the copy editor. Travis Mitchell, digital producer, provided web support. All are on the staff of Pew Research Center.
An earlier draft of this paper was prepared for presentation in Paris to the Organization for Economic Co-operation and Development (OECD) Working Party on Migration.