AL-KHAFAJI, L. A. . Estimation of the National Income Function (United States and China): A Comparative Study for the Period (2000-2019) . International Journal on Economics, Finance and Sustainable Development, [S. l.], v. 6, n. 2, p. 302–316, 2025. DOI: 10.31149/ijefsd.v6i5.5281. Disponível em: https://journals.researchparks.org/index.php/IJEFSD/article/view/5281. Acesso em: 29 sep. 2026.