Date of birth and achievement in GCSE and GCE A‐level

Abstract
General Certificate of Secondary Education (GCSE) examinations are taken by almost all pupils in England, Wales and Northern Ireland at age 16 years. General Certificate of Education Advanced level (GCE A‐level) examinations are normally taken by relatively able students at age 18. The effect of month of birth on attainment in these public examinations is investigated through a database which brings together the 1991 GCSE results and the 1993 GCE A‐level results of all candidates born between September 1974 and August 1975. Older pupils perform best at GCSE but not at GCE A‐level. Selection effects on entry to A‐level courses appear to explain why this is the case.