Circumstantial development and athletic excellence: The role of date of birth and birthplace

Abstract
Researchers are only beginning to understand how contextual variables such as date of birth and birthplace affect the development of elite athletes. This article considers the generality of birthplace and date-of-birth effects in varying sport contexts. The Study 1 examined how environmental factors associated with an athlete's date-of-birth and size of birthplace predict the likelihood of becoming an Olympic athlete in Canada, the United States of America, Germany, and the United Kingdom. Study 2 examined date-of-birth and birthplace effects among athletes playing in the first professional league in Germany. Study 2 also examined the validity of birthplace as a proxy for early developmental environment by comparing birthplace with the place of first sports club in four German sports leagues. Results from both studies showed no consistent findings for date of birth. Findings from Study 2 also suggested incongruence between birthplace and location of first sports club as proxies for early developmental environment. Although there was some consistency suggesting elite athletes are less likely to come from very small or excessively large communities, exceptions occurred both within and across sport contexts. These results suggest that any developmental effects of date and place of birth are buffered by broader socio-cultural factors.