When emotion regulation matters: the efficacy of socio-emotional learning to address school-based violence in Central America / Lelys Dinarte-Diaz (World Bank, IZA, CESifo and HiCN), Pablo Egana-delSol (Adolfo Ibanez University School of Business, EGAP and MNEW), Claudia Martinez A. (Inter-American Development Bank and Pontificia Universidad Católica de Chile), Cindy Rojas A. (Inter-American Development Bank) ; IZA Institute of Labor Economics