This website presents a new index of the Europeanisation of policy based on an expert survey. The index provides a valuable new resource, encompassing 1957 to the present day, on the distribution of authority between the EU and member states across policy fields, and on the ideological content of primary and secondary legislation. The expert survey was completed by 245 experts in nine policy areas, corresponding to the nine configurations of the Council of the EU. A total of 28 narrower subfields were included.

This research was supported by the British Academy and Leverhulme Trust Small Research Grant (SG121936).