(June 2012) The Wisconsin Longitudinal Study (WLS) is a long-term study of a random sample of over 10,000 men and women who graduated from Wisconsin high schools in 1957. In this interview, Pamela Herd, associate professor of Public Affairs and Sociology at the University of Wisconsin-Madison, discusses some major research findings from the WLS and what they can tell us about aging in the United States along with potential policy implications.