Ever since those partitions, migration within the region has remained a thorny emotional issue.
Thereafter the patterns of inward migration within the EU diverged considerably.
They are for secondary students and cover migration, migration within the EU and the case of refugees and asylum seekers.
Cameron's central theme – freedom of movement, and above all economic migration within the EU – will be the biggest problem.
Europol's findings may also fuel the growing debate about migration within the European Union.
In the short run the rate of migration within the EU is likely to slow.
"Corporate migration within the United States is definitely accelerating," said Allen J. Scott, a geographer at the University of California at Los Angeles who specializes in economic issues.
Andor, a Hungarian who studied in Manchester, is to travel to Bristol on Monday to argue his case for the benefits of labour migration within the EU.
Migration within the 27 nations of the European Union has become a combustible issue during the economic downturn.
The Financial Times reported on Monday that Britain was struggling to find allies in the EU to back its call for an EU-wide tightening of the rules on migration within the region.
But since 1996, corporate migration within the country has soared, roughly doubling to more than 11,000 moves a year, according to Site Selection Magazine of Atlanta, the only organization, public or private, to track the phenomenon.
