Core Cities is an association of eleven cities in the UK: Belfast, Birmingham, Bristol, Cardiff, Glasgow, Leeds, Liverpool, Manchester, Newcastle, Nottingham, and Sheffield. Altogether, Core Cities and their surrounding regions account for around one quarter of the UK population and economy....

This paper estimates agglomeration benefits based on city productivity differentials across five OECD countries (Germany, Mexico, Spain, United Kingdom, and United States). It highlights the relationship between cities’ governmental fragmentation and productivity, and represents the first...