Wulandari, R., Hasyim, S. and Rahman, A. 2026. The Effect of Economic Growth, Population, Human Development Index (HDI), and Poverty on Income Inequality in North Sumatra. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE). 9, 1 (Feb. 2026), 3481-3492. DOI:https://doi.org/10.31538/iijse.v9i1.9236.