The research program I follow has an emphasis on constitutional law. My research focuses on the question of how law can have a reasonable and effective influence on individual behavior in order to solve specific societal problems. In this context, I have, e.g., recently shown in experimental studies that German gambling regulation is unconstitutional, as its underlying assumptions cannot stand empirical validation; and that the European Commission is right, from a behavioral perspective, when regulating targeted rollback rebates with a view to their exploiting decision biases. Currently, I am working on a book on political parties and on experiments in a field that could best be described as ‘behavioral public choice’. Another research area that I am actively pursuing is law and religion; among other publications, my Ph.D. dissertation was in this field.