Analysis of information sources in references of the Wikipedia article "Human migration" in English language version.
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Differential migration is selective migration, or migration that tends to involve some segments of a population more than it does others.
[Some twentieth-century population movement in Europe] was no longer a migration of excess rural population motivated largely by economic considerations, but an ethnic exodus rarely seen since the time of the Völkerwanderung. ("Völkerwanderung" is a term borrowed from German historiography. In the narrow sense, it refers to Germanic migrations of the first five centuries A.D., but, more broadly, it can be applied to any mass migration involving whole tribes/ethnies.)
Since social norms can create groups with greater internal harmony, cooperation, and economic production, many individuals will be inclined to migrate into more successful groups from less successful ones. [...] Over time, the more successful groups will expand through immigration whereas other groups will contract through emigration.
[...]families may assume transnational morphologies with the strategic intent of ensuring economic survival or maximising social mobility.
{{cite web}}: CS1 maint: deprecated archival service (link)[Some twentieth-century population movement in Europe] was no longer a migration of excess rural population motivated largely by economic considerations, but an ethnic exodus rarely seen since the time of the Völkerwanderung. ("Völkerwanderung" is a term borrowed from German historiography. In the narrow sense, it refers to Germanic migrations of the first five centuries A.D., but, more broadly, it can be applied to any mass migration involving whole tribes/ethnies.)
The proximity of North Africa to southern Europe, the liberal mobility policies of most European countries, and the historical links between northern and southern Mediterranean countries are all key factors encouraging people to migrate to Europe.
The proximity of North Africa to southern Europe, the liberal mobility policies of most European countries, and the historical links between northern and southern Mediterranean countries are all key factors encouraging people to migrate to Europe.