WAN, Zhichen. The Substitution Effect of Artificial Intelligence on Middle-Skill Jobs: A Core Source of Labor Market Polarization. International Journal of Law, Ethics and Social Sciences, [S. l.], v. 3, n. 4, p. 1–11, 2026. DOI: 10.70088/g3rn0s93. Disponível em: https://soapubs.com/index.php/IJLESS/article/view/2871.. Acesso em: 12 sep. 2026.