%0 Report %A Akesaka, Mika %A Shigeoka, Hitoshi %T Hotter Days, Wider Gap: The Distributional Impact of Heat on Student Achievement %D 2025 %8 2025 Oct %I Institute of Labor Economics (IZA) %C Bonn %7 IZA Discussion Paper %N 18165 %U https://www.iza.org/publications/dp18165 %X This study demonstrates that heat disproportionately impairs human capital accumulation among low-performing students compared with their high-performing peers, using nationwide examination data from 22 million students in Japan. Given the strong correlation between academic performance and socioeconomic background, this suggests that heat exposure exacerbates pre-existing socioeconomic disparities among children. However, access to air conditioning in schools significantly mitigates these adverse effects across all achievement levels, with particularly pronounced benefits for lower-performing students. These findings suggest that public investment in school infrastructure can help reduce the unevenly distributed damage caused by heat to student learning, thereby promoting both efficiency and equity. %K air conditioning %K adaptation %K student achievement %K distributional impact %K heat %K children %K climate change