In recent times, the economic policy of regularisation has met with the labour-law perspective of the late Marco Biagi. This has led to a breakthrough with significant consequences for the fascinating subject of declared employment. This book discusses the terms of this encounter from various points of view. In the first section, it presents the issue of the regularisation of female workers and proposes a horizontal-vertical analytic framework to address irregular employment in new and old sectors. In the second, it calls attention to some salient aspects of the Italian experience to compare them with the historical-logical context within which Marco Biagi developed his own project. In the third, it scrutinizes the contrast between the perspective of regularisation and that of labour reform with a threefold purpose: to shed light on the ‘new phase’ of the current economic policy, also with respect to the irregular employment generated by ‘European integration’; to propose a generalisation of EU policy for regularisation; and to discuss the possibility that a real enhancement in the quantity and quality of employment contributes to the positive development of our market-based liberal democracy. The conclusion is that, surprisingly, the versatility of Marco Biagi’s contributions suggests new perspectives on areas related to the ones opened up (as in the case of regularisation) and proposes further theoretical-applicative solutions in the logic of public interest.