[pierrem15]

For the US at least, all sports ought to be dominated by people of European ancestry: despite differences in phenotype that may (statistically) produce better African than European athletes (such as bone length, height, etc.), there are so many more Americans of European ancestry that there will always be many, many more individuals of European ancestry than African ancestry with desirable athletic traits.

What happen is that almost none of those with European ancestry take sports as a serious career choice, and of those that do, they may demand a higher price or be more difficult to deal with (because they have other choices available to them) than black athletes of similar ability, which would also create a selection bias for blacks.

Black dominance in US sports is mainly a matter of selection bias, both by the individuals and sport institutions.

[Jack Black]

Black dominance in US sports is mainly a matter of selection bias, both by the individuals and sport institutions.

Really, I doubt it. There are lots of high school track teams, and lots of people who run on them, but invariably the people making it to the Olympics are black. And, it's not just the USA. Countries like the UK and France, that have even smaller black populations, send black sprinters to the Olympics too. Is selection bias working in every country as it does in the USA, despite very different cultures.