„The traditional immigrant receiving countries and the United Kingdom tend to have smaller or even negative gaps […] It seems plausible that those countries with an established tradition of immigration and/or a strong English speaking presence have immigrant children with higher performance, although establishing a high, in contrast to a low, skills national immigration policy – exemplified by Australia, Canada and New Zealand’s point systems – also likely plays a role.“
Prof. Dr. Arthur Sweetman u. a., „Immigration: What About the Children and Grandchildren?“ (2014), S. 16