„Canada, for instance, has a highly restrictive immigration policy and admits immigrants based on a system assigning points to such characteristics as level of education and English language proficiency. Immigrants are only admitted if they reach a specified number of points.“
Aileen Edele u.a., „PISA’s Potential for Analyses of Immigrant Students’ Educational Success“. In: Pereyra u.a. (Hrsg.), „PISA Under Examination“ (2011), S. 191