DEMOGRAPHIC RESEARCH VOLUME 36, ARTICLE 63, PAGES 1917,1928 PUBLISHED 29 JUNE 2017 http://www.demographic-research.org/Volumes/Vol36/63/ DOI: 10.4054/DemRes.2017.36.63 Descriptive Finding The strength and vulnerability of school-age children Svenn-Erik Mamelund Bjørn Haneberg Siri Mjaaland © 2017 Svenn-Erik Mamelund, Bjørn Haneberg & Siri Mjaaland. This open-access work is published under the terms of the Creative Commons Attribution NonCommercial License 2.0 Germany, which permits use, reproduction & distribution in any medium for non-commercial purposes, provided the original author(s) and source are given credit. See http:// creativecommons.org/licenses/by-nc/2.0/de/