Jeffrey Jensen Arnett, PhD, of Clark University in Worcester, Massachusetts, is the originator of the term emerging adulthood. He has published numerous articles on emerging adulthood and is the author of the book Emerging Adulthood: The Winding Road From the Late Teens Through the Twenties (2004). In addition, he is the author of the textbook Adolescence and Emerging Adulthood: A Cultural Approach (2004). He is the editor of the Journal of Adolescent Research and of three forthcoming encyclopedias: the Routledge International Encyclopedia of Adolescence (four volumes), the Encyclopedia of Children, Adolescents, and the Media (two volumes), and the Encyclopedia of Emerging Adulthood (one volume). His other scholarly interest includes the psychology of globalization.   Jennifer Lynn Tanner, PhD, is a research assistant professor at Simmons College, Boston, Massachusetts. She is coinvestigator of the Simmons Longitudinal Study, a longitudinal study of mental health and adaptation from childhood through age 30, funded by the National Institute of Mental Health. Her work converges around the theme of mental health and adaptation across the life span, with a focus on the influence of early family experiences on pathways of adjustment during emerging adulthood. She has published work on changing relationships between fathers and adult children after parental divorce, adolescent depression and suicidal ideation, and psychiatric disorder during emerging adulthood. In addition to her studies of emerging adult development and adjustment, Dr. Tanner studies the intergenerational transmission of risk for psychopathology from emerging adult parents to their offspring.