Immigration is a phenomenon of growing significance in many countries. Increasing social tensions are leading to political pressure to limit a further influx of foreign-born persons on the grounds that the absorption capacity of host countries has been exceeded and social cohesion threatened....

Immigration is a phenomenon of growing significance in many countries. Increasing social tensions are leading to political pressure to limit a further influx of foreign-born persons on the grounds that the absorption capacity of host countries has been exceeded and social cohesion threatened....

The ongoing relationships between emigrants and their families, friends, and business contacts in their home countries can increase outbound and inbound crossborder travel, while cross-border tourism and business and study trips can trigger migration. New communication technologies, such as...