Global City Migration Map / Migration Policy Institute, March 2007
http://www.migrationinformation.org/datahub/gcmm.cfm
"In most cases, international migrants do not randomly choose their country of destination. On the contrary, for a variety of economic, social, linguistic, and other reasons, they migrate to certain countries and, within these countries, to certain cities.
The Global City Migration Map allows you to expand your knowledge and understanding of the movements of international migrants to urban gateways around the world."