John Wilson is professor emeritus of sociology at Duke University in Durham, N.C. He has written articles on religion and marriage and also about religion and leisure. He has taught a class on sport and society.

Jeremy Uecker is an assistant professor of sociology at Baylor University and co-author, with Mark Regnerus, of Premarital Sex in America: How Young Americans Meet, Mate and Think about Marrying (2010).

Philip Lyndon Reynolds is professor of historical theology and a senior fellow at the Center for the Study of Law and Religion at Emory University in Atlanta. He is the author of Marriage in the Western Church: The Christianization of Marriage During the Patristic and Early Medieval Periods.

Robin Dion is a research psychologist at Mathematica Policy Research, which has offices in Washington, D.C., and Princeton, N.J. She is the principal investigator for a federally funded research project, Strengthening Families with a Child Born Out-of-Wedlock. Contact Mathematica Policy Research.

Paul Amato is a professor of sociology, demography and family studies at Pennsylvania State University. His research interests include marital quality, the causes and consequences of divorce and subjective well-being over the life course.

Kathryn Edin is professor of public policy and management at Harvard University’s John F. Kennedy School of Government. She is co-principal investigator for “Couple Dynamics and Father Involvement,” a qualitative study of 75 low-income married and unmarried couples with young children in Chicago, Milwaukee and New York City.

Bradley Wright, a University of Connecticut sociologist, is the author of Christians Are Hate-Filled Hypocrites … and Other Lies You’ve Been Told (2010). He asserts that infidelity occurs less frequently among churchgoers.

W. Bradford Wilcox is director of the National Marriage Project at the University of Virginia. He is co-editor of When Marriage Disappears: The New Middle America and author of articles on domestic abuse in outlets such as The New York Times and The Wall Street Journal.

Sheila Weber is executive director of National Marriage Week USA, which takes place annually leading up to Valentine’s Day.