Brian J. Grim is senior researcher in religion and world affairs at the Pew Research Center's Forum on Religion and Public Life in Washington, DC. Dr Grim is also the co-principal investigator for the international religious demography project at Boston University's Institute on Culture, Religion and World Affairs, where he co-edits the World Religion Database (www.WorldReligionDatabase.org). His findings on international religious demography and religious freedom have been covered by all the major news outlets, including the BBC, CNN, the Associated Press, and Reuters, and he frequently presents to high-level governmental and nongovernmental groups. Dr Grim has extensive overseas experience. From 1982 to 2002, he lived and worked as an educator, researcher, and development coordinator in China, the former USSR, Central Asia, Europe, Malta, and the Middle East.

Roger Finke is Professor of Sociology and Religious Studies at the Pennsylvania State University and Director of the Association of Religion Data Archives (www.theARDA.com). He has published in numerous social science journals and has co-authored two award-winning books with Rodney Stark: Acts of Faith: Explaining the Human Side of Religion and The Churching of America, 1776–1990. He is the past president of the Association for the Study of Religion, Economics, and Culture; is a past chair of the American Sociological Association's Sociology of Religion Section; and has served as a member of multiple national and international councils, boards, and committees. He is the 2009 recipient of the Pennsylvania State University President's Award for integrating research, teaching, and service.