Dinand Webbink is professor of Policy Evaluation at the Erasmus School of Economics of the University of Rotterdam. He received his PHD in Economics at the University of Amsterdam in 1999. Before joining the Erasmus University he worked at the Dutch Bureau for Economic Policy Analysis (CPB) and the Dutch Educational Council. His main area of research is economics of education but he is also interested in other fields like labor, health, social policy or crime. His research focuses on identifying the causal effects of interventions or policies.