Hidayat, M., Bachtiar, N., Sjafrizal, S. and Primayesa, E. 2023. The Influence of Investment, Energy Infrastructure, and Human Capital Towards Convergence of Regional Disparities in Sumatra Island, Indonesia; Using Oil and Gas Data and Without Oil and Gas. International Journal of Energy Economics and Policy. 13, 4 (Jul. 2023), 139–149. DOI:https://doi.org/10.32479/ijeep.14117.