The Effect of Downstream Policies, Exchange Rates, Production and International Prices on Indonesia’s Nickel Export Volume with Global Demand as a Mediator Variable for the 2015-2024 Period. HORIZON: Indonesian Journal of Multidisciplinary, [S. l.], v. 4, n. 4, p. 3782–3800, 2026. DOI: 10.54373/hijm.v4i4.6650. Disponível em: https://ejournal.indo-intellectual.id/index.php/hijm/article/view/6650. Acesso em: 12 aug. 2026.