None of the countries has, so far, adopted a specific policy to attract highly skilled migrants.

BBC: How it's worked out

To complicate matters, highly skilled migrants contribute much more to tax and social-security systems than do less skilled ones.

ECONOMIST: Of bedsheets and bison grass vodka

Singapore was chosen as a country which has become increasingly attractive to highly skilled migrants, according to the OECD reports.

BBC: How it's worked out

Only South Africa, Russia and the Special Administrative Regions (SAR) of China seem to have specific policies for highly skilled migrants.

BBC: How it's worked out

Rich countries have taken in more highly skilled migrants than ever before.

ECONOMIST: Open up | The

Indians have been granted over three times as many visas for highly skilled migrants as any other nationality since the Home Office invented the category in 2002.

ECONOMIST: Britain and India

Various surveys of employers come to the predictable conclusion that migrants are better employees: they are more highly skilled, work harder and are prepared to do jobs that locals disdain.

ECONOMIST: Immigrants