Circular Migration: A Matter of Trial and Error / Migration Policy Institute, 4 September 2008
http://www.migrationpolicy.org/news/2008_09_04.php
"Policymakers in migrant-receiving countries all over the world are exploring the concept of circular migration as a way to improve upon the discredited temporary worker programs of the past. As a new policy tool that allows migrants to move more freely back and forth between their origin and destination countries, circular migration increases the likelihood that global mobility gains will be shared by both – and gives migrants more options to advance their working lives."