The Columbia Global Policy Initiative has made a submission about the role of cities to the Special Representative of the Secretary General for International Migration in relation to the Global Compact for Migration. It includes this claim:
local authorities and mayors in particular play a crucial role in framing greater diversity as a complex but fundamentally fruitful outcome of globalization.
This claim is referenced with a citation to a report I co-wrote: Elizabeth Collett & Ben Gidley, ESRC Centre on Migration, Policy and Society (COMPAS), University of Oxford, Attitudes to Migrants, Communication and Local Leadership
(AMICALL) — Final Transnational Report (2012) see at https://www.compas.ox.ac.uk/media/PR-2012-AMICALL_Transnational.pdf .