O’LEARY, N. C.; MURPHY, P. D.; BLACKABY, D. H. The Effect of Unionisation on Wages in Great Britain: Estimates from the Labour Force Survey. Economic Issues, [S. l.], v. 8, n. 1, p. 33–45, 2003. Disponível em: https://mail.economicissues.org.uk/index.php/EI_OJS/article/view/94. Acesso em: 11 nov. 2026.