The study was of English schools because comparable data is not available from schools in Scotland, Wales and Northern Ireland.

BBC: State schools 'failing girls who want to study physics'

In 1992 he took a year off from prestigious Moscow State University to study at Beloit College in Wisconsin, where he perfected his English.

FORBES: The non-oligarchs

This study, which came out in French three years ago and now in English, is a homage from a critical admirer.

ECONOMIST: Jean-Paul Sartre