Christoph Engel is Director of the Max Planck Institute for Research on Collective Goods, Bonn, and a member of the Faculty of Law and Economics at the University of Bonn. He is the author of Generating Predictability: Institutional Analysis and Design and other books.

Wolf Singer is Emeritus Director of the Max Planck Institute for Brain Research and Founding Director of the Frankfurt Institute for Advanced Studies and the Ernst Strüngmann Institute for Neuroscience in cooperation with the Max Planck Society, where he is also Senior Research Fellow. He is the coauthor of Beyond the Self: Conversations between Buddhism and Neuroscience (MIT Press).