“…In this article, we elaborate on two robust findings of previous studies which, despite the egalitarian goals of education policy, have established that educational achievement is positively affected by the socioeconomic resources of students' families (Breen & Jonsson, 2005;Breen, Luijkx, Müller, & Pollak, 2010;Erikson, Goldthorpe, Jackson, Yaish, & Cox, 2005;Sirniö, Martikainen, & Kauppinen, 2016) and negatively affected by poor mental health during childhood and adolescence (Becchetti, Conzo, & Pisani, 2018;Brännlund, Strandh, & Nilsson, 2017;Cutler & Lleras-Muney, 2008). The latter is a growing concern because during the last decade there has been a steady increase in the share of young people suffering from poor mental health, measured in terms of either prescription of drugs or self-ratings by respondents (Almroth, László, Kosidou, & Galanti, 2018;Baroudi et al, 2019;Stenmark, Bergström, Hägglöf, Öhman, & Petersen, 2016).…”