About the Author

Marina Hennig is professor of social network research and sociology of the family at Johannes Gutenberg-Universitat Mainz. Ulrik Brandes is professor of algorithmics in the Department of Computer and Information Science at the University of Konstanz. Jurgen Pfeffer is assistant research professor at the School of Computer Science at Carnegie Mellon University. Ines Mergel is assistant professor for public administration and international affairs at the Maxwell School of Citizenship and Public Affairs at Syracuse University.