The European and national parliaments in the area of freedom, security and justice: does interparliamentary cooperation lead to joint oversight?

To what extent does the cooperation of national parliaments and the European Parliament strengthen the oversight of EU executive actors in the Area of Freedom, Security and Justice? The article provides an ideal-typical conceptualisation of individual and joint parliamentary oversight in the EU's multi-level system. Legislative scrutiny is examined for the case of the General Data Protection Regulation and agency oversight is analysed for the case of Europol. In both cases, the article demonstrates that the interparliamentary cooperation has not led to a joint oversight. Legislative scrutiny was badly timed, characterised by diverging interests, and a high fluctuation of the participating parliamentarians. The Joint Parliamentary Scrutiny Group over Europol has turned out to become a primarily symbolic layer to the 'individual oversight' exercised by the European Parliament's LIBE committee.