%0 Journal Article %T Skilled and unskilled wage differentials and economic integration, 1870–1930 %A Betrán, Concha %A Pons, Maria A. %J The European Review of Economic History %V 8 %N 1 %P 29-60 %@ 1361-4916 %D 2004-04-01 %I Oxford University Press %~ DeepDyve