Systems of migrant labor are characterized by a physical and temporal separation of the processes of reproduction of the labor force and the production from that labor force. The migrant laborer can survive on low wages while contributing to economic production in one context because the family, community, and state in the other context provide education, health care, and other services necessary for reproduction. In this way, the host state externalizes the costs of labor force renewal and benefits even further from the phenomenon of labor migration.
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The separation of these processes is not a natural or a voluntarily chosen phenomenon but must be enforced through the meeting of contradictory political and economic forces. Systems of labor migration involve economic forces inviting and even requiring the cheap labor of migrants at the same time that political forces ban migrants from entering the country.