Definition: Established migrant workers
Migration statistics - ILO
Established migrant workers are migrant workers who, after staying some years in the country of employment, have been granted the permission to reside indefinitely and to work without major limitations in that country. Established migrant workers need not leave the country of employment when unemployed and are usually granted the right of being joined by their immediate family members, provided certain conditions regarding employment and housing are met.
BILSBORROW R. E., HUGO G., OBERAI A. and ZLOTNIK H., "International Migration Statistics: Guidelines for improving data collection systems", International Labour Office (ILO), Geneva, 1997