Comparing School Systems to Explain Enduring Birth Date Effects: a response to McDonald (2001).

Comments on the article by Geraldine McDonald about a research into the relative performance of the youngest in the year group in different countries, published in the volume 31:3 issue of the 'Compare' journal. Birth date effects; McDonald's attempt to explain the persistence of season of birth effects in Great Britain; Age-related organization in English and Welsh schools.