Wahyuni, T., Lakilaki, E., Wijaya, P. and Anisha, A. 2026. Labour Underutilisation in the BRICS-4: Do Exchange Rates and Foreign Direct Investment Matter?. Journal of Business and Economics Research (JBE). 7, 1 (Feb. 2026), 77-85. DOI:https://doi.org/10.47065/jbe.v7i1.9151.