The skill content of occupations across low and middle income countries : evidence from harmonized data / Emanuele Dicarlo (University of Zurich), Salvatore Lo Bello (Universidad Carlos III de Madrid), Sebastian Monroy-Taborda (World Bank and NORC), Ana Maria Oviedo (The World Bank), Maria Laura Sanchez-Puerta (The World Bank and IZA), Indhira Santos (The World Bank) ; IZA