As shown in more than 10,000 low-in-come boys and girls, children largely of West African ancestry (American Negroes or blacks) tended to have greater statures during the first 12 years of life, particularly children matched for per-capita income and in whom black-white differences in stature averaged in excess of 2.0 cm.
Garn SM, Clark DC, Trowbridge FL. Tendency Toward Greater Stature in American Black Children. Am J Dis Child. 1973;126(2):164-166. doi:10.1001/archpedi.1973.02110190144006