Une action syndicale européanisée ? La représentation des travailleurs frontaliers par les syndicats au Luxembourg.

The diversification of labour migrations raises new challenges for labour market and industrial relations actors, particularly trade unions. This contri­bution focuses on cross-border work, using the example of Luxembourg's highly internationalised labour market. Drawing on qualitative research and survey data, the contribution sets out the different dimensions of the unionisation of cross-border workers: cross-border collaboration between unions, individual service provision based on European law and confronta­tion between union cultures. It then discusses the political dilemmas that may arise when unions defend the interests of cross-border workers. The contribution thus highlights the role of non-state actors, such as trade unions, in building social ties in cross-border regions, and sheds light on the modalities of the Europeanisation of trade union action.