Secondary Migration: Who Re-Migrates and Why These Migrants Matter / Migration Information Source, April 2007
http://www.migrationinformation.org/Feature/display.cfm?id=597
Ayumi Takenaka
"As the volume of immigration has grown, the routes and patterns of migration have become more complex. Population movements today are not only circular and transnational but are increasingly sequential, involving more than one destination. This general trend is known variously as two-step, re-migration, or secondary migration."