2026. Why is Education Improving? An Economic and Poverty Investigation of Average Length of Schooling in the Context of SDG 4 (Quality Education) in East Java 2015-2024. Journal of Psychology and Culture Behavior in SDGs. 2, 1 (Jan. 2026), 000114. DOI:https://doi.org/10.63230/jopacbis.2.1.114.