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Ability stratification based on geography is common in the United States ...

„Ability stratification based on geography is common in the United States, and public/private school divisions remain relatively common in Australia and Great Britain.“

Dr. Philip Parker u. a., „A Multination Study of Socioeconomic Inequality in Expectations for Progression to Higher Education“. In: „American Educational Research Journal“, February 2016, Vol. 53, No. 1, S. 24