?Should the Definition of Micropenis Vary According to Ethnicity?? Pik Shun Cheng and Jean-Pierre Chanoine, Hormone Research, vol. 55, no. 6, 2001, pp. 278?81. (http://dx.doi.org/10.1159/000050013). (Thanks to Len Finegold for bringing this to ur attention.) The authors, who are at University of British Columbia, explain how they explored the question:
We determined whether the existing reference values for the diagnosis of micropenis are appropriate for optimal care of neonates in a multiethnic environment like Vancouver. Methods: The stretched penile length and width were measured in 105 full-term newborn males of Caucasian, Chinese, and East-Indian origin.
(That’s an except from the article “Boys Will Be Boys,” published in AIR 13:5.)