Equalization through Deterioration: The Shrinking Gender Gap in Swedish School Grades

This article documents a surprising reversal in the long-standing gender gap in academic achievement: between 2021 and 2024, Swedish girls’ school grades declined sharply, whereas boys’ grades remained stable, narrowing the gender gap by over a third. Using full-population data on official school grades and national test scores, the analysis shows that the decline is broad based, affecting nearly all subjects and concentrated among previously high-performing girls. Changes in grading policy or long-term mental health trends are unlikely to account for the sudden downturn. Instead, the evidence points to behavioral changes in girls’ school engagement, possibly triggered by external shocks. Among the most plausible shocks are the rise of TikTok, which increased in popularity among girls just before the grade decline, and Covid-19 disruptions, which may have acted as a catalyst. Although the causes remain uncertain, the pattern signals a sociologically significant disruption, challenging assumptions of stable female academic advantage and inviting international replication.