“…Secondly, gender equality can contribute to economic growth (Altuzarra et al, 2021;Santos Silva and Klasen, 2021), particularly through increased participation in STEM jobs (Maceira, 2017;Hammond et al, 2020), which critically depend on achievement, self-concept, and course choices of STEM subjects in school (Updegraff et al, 1996;Parker et al, 2012;Watt et al, 2012Watt et al, , 2017Schoon and Eccles, 2014. Referring to these arguments which underscore the relevance of monitoring effects of educational initiatives and reforms on gender disparities in general, it seems reasonable to believe that the G8-reform might specifically affect gender disparities in STEM. As girls and boys report different levels of self-concept and interest in math-intensive domains of STEM, which are central for subsequent achievement (e.g., Else-Quest et al, 2010;Hübner et al, 2017bHübner et al, , 2019Eccles and Wigfield, 2020;Wu et al, 2021), it is important to investigate if the reform-induced intensifications/compression in lower secondary school might affect gender disparities in STEM-related achievement and motivation.…”