Professor Marshall has a joint appointment in Sociology and Criminal Justice. She specializes in the study of comparative criminology, ethnicity and crime, self-report methodology, juvenile delinquency and criminal careers. Her current research focuses on cross-national surveys of juvenile delinquency and comparative examination of homicide. She is a member of the Steering Committee of the International Self-Report Study of Delinquency (ISRD-2), an international collaborative study with participants from 30 European countries and North America. She serves on the editorial board of several international and national journals. Professor Marshall serves as the American Society of Criminology Lead Liaison to the United Nations.