Peter Mascini holds a chair in Empirical Legal Studies at the Erasmus School of Law. He is also an associate professor of sociology at the Faculty of Social and Behavioural Sciences of the Erasmus University Rotterdam. His research focuses on the legitimization, implementation and enforcement of legal instruments and specific policies. More specifically, he assesses what presuppositions underlie instruments and policies, how these presuppositions are connected to the motives and interests of decision-makers and policy subjects, and what happens if these actors do not act in accordance with the presuppositions underlying the instruments and policies. In his research he uses both quantitative and qualitative methods. Recently, he has studied, for instance, the presuppositions related to sentencing, Responsive Regulation, choice and competition in education, health and safety inspection, apologizing in personal injury litigation, and governing intermediaries in legalized prostitution.