Wage Inequality Determinants in European Union Countries
Óscar Afonso, Ana Lurdes Albuquerque, Alexandre Almeida
Applied Economics Letters, vol. 20, 2013, p. 1170-1173.

SBTC versus Trade: Testing Skill-Premia Evidence across 25 OECD Countries
Alexandre Almeida, Óscar Afonso
Applied Economics Letters, vol. 17, 2010, p. 1497-1501.