The study of employment relations in Chile and Argentina has been the outcome of research in various disciplines particularly sociology, political science, law, and history. This broadly defined scholarship has followed similar lines of analysis in both countries, reflecting their parallel socio-economic transformations and corresponding changes in employment relations actors and institutions. From the rise of import substituting industrialisation and developmentalist populist regimes in the 1930s, which provided the base upon which ‘classic’ employment relations systems began to take shape, to the crises and replacement of such regimes by military dictatorships and the introduction of neoliberalism in the 1970s, which redefined the relationship between capital and labour.