In 2017, regional GDP per capita, expressed in terms of purchasing power standards, ranged from 31% of the European Union (EU) average in the Bulgarian region of North-West, to 626% of the average in Inner London – West in the United Kingdom.
- Daniel Gros, Roberto Musmeci and Marta Pilati, (2018), «The European Dimension of Regional and Cohesion Policies», working paper 3, CEPS, Brussels and Laboratorio LUISS sul Mezzogiorno, December 2017
- Kregel, Jan, (2017), «A Two-Tier Eurozone or a Euro of Regions? A radical Proposal based on Keynes’ clearing union», Levy Economics Institute of Bard College, Public Policy Brief No. 144, September