Fabio Berton is a Policy Analyst for Impact Evaluation at the Competence Centre for Microeconomic Evaluation of the Joint Research Centre of the European Commission and Associate Professor of Economic Policy at the University of Turin, Italy. His research interests are labor economics and policy evaluation.Paolo Paruolo is Head of the Competence Centre for Microeconomic Evaluation of the Joint Research Centre of the European Commission, Italy. His research focuses on time-series econometrics. He served as a Professor of Econometrics at the University of Bologna and University of Insubria, Italy.