Analysis of the Relationship between Economic Development and Happiness Index in Indonesia. Efficient: Indonesian Journal of Development Economics, [S. l.], v. 7, n. 2, p. 140–149, 2024. DOI: 10.15294/efficient.v7i2.1467. Disponível em: https://journal.unnes.ac.id/journals/efficient/article/view/1467. Acesso em: 6 feb. 2026.