Robert K. Yin is President of COSMOS Corporation, an applied research and social science firm. Over the years, COSMOS has successfully completed hundreds of projects for federal agencies, state and local agencies, and private foundations, and most of this book's applications come from these projects. Outside of COSMOS, Dr. Yin has assisted numerous other research groups, helping to train their field teams or to design research studies. A recent engagement has been with the United Nations Development Programme, and another assignment has been to provide guidance to assist doctoral students at the University of Copenhagen. Currently, Dr. Yin holds the position of distinguished scholar-in-residence at American University's School of International Service (Washington, DC). Earlier, he served as Visiting Scholar at the U.S. Government Accountability Office's research methodology division. Dr. Yin has authored nearly 100 journal articles and books. His first book on the case study method, Case Study Research: Design and Methods (2014) is in its fifth edition. He has edited two case study anthologies (Yin, 2004; and 2005) and has most recently authored a new text on qualitative research methods (Yin, 2011). Dr. Yin received his B.A. in history from Harvard College (magna cum laude) and his Ph.D. in brain and cognitive sciences from M.I.T.Karen A. Cerulo (PhD, Princeton University) is a professor of sociology at Rutgers University. Her research interests include culture and cognition, symbolic communication, media and technology, and comparative historical studies. Professor Cerulo's articles appear in a wide variety of journals, including the American Sociological Review, Contemporary Sociology, Poetics, Social Forces, Sociological Forum, Sociological Inquiry, Communication Research, and annuals such as the Annual Review of Sociology and Research in Political Sociology. She is the author of three books: Identity Designs: The Sights and Sounds of a Nation, winner of the ASA Culture Section's award for the Best Book of 1996 (Rose Book Series of the ASA, Rutgers University Press); Deciphering Violence: The Cognitive Structure of Right and Wrong (Routledge); and Never Saw It Coming: Cultural Challenges to Envisioning the Worst (University of Chicago Press). She has also edited a collection entitled Culture in Mind: Toward a Sociology of Culture and Cognition (Routledge). Professor Cerulo's teaching and research earned her both the Rutgers University Awards for "Distinguished Contributions to Undergraduate Education" and the "Scholar-Teacher Award." In 2014, she was named the Robin Williams Lecturer for the Eastern Sociological Society.