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COVID-19 and its effect on income of different social groups in Vietnam: A comparative analysis . The Economics and Finance Letters, [S. l.], v. 12, n. 2, p. 215–230, 2025. DOI: 10.18488/29.v12i2.4183. Disponível em: https://archive.conscientiabeam.com/index.php/29/article/view/4183. Acesso em: 5 aug. 2026.