1. Postgraduate Department, Universidad de la Sierra Sur, Oaxaca 70800, Mexico
2. Benemérito Instituto Normal del Estado General Juan Crisóstomo Bonilla, Puebla 72140, Mexico
3. UNITWIN/UNESCO IPD-SILOS, University of Las Palmas de Gran Canaria, 35001 Las Palmas de Gran Canaria, Spain
4. Centre for Social Data Science, Faculty of Social Sciences, University of Helsinki, 00100 Helsinki, Finland