If they are it will never be published.
The irony is that various enthusiasts will readily believe in the heritability of all kinds of characteristics, in a vacuum of evidence, but will rear up in outrage at the idea of inherited differences in intelligence, for which a large body of evidence exists. The problem is that the evidence works for individuals but not for racial groups in countries like the US, where too much genetic mixing has taken place to test the racial hypothesis. Effective population testing for Africa has not been done and never will be for obvious political reasons. So the proposition will remain conjecture for the indefinite future and open to demagoguery from all sides.
“The irony is that various enthusiasts will readily believe in the heritability of all kinds of characteristics, in a vacuum of evidence, but will rear up in outrage at the idea of inherited differences in intelligence, for which a large body of evidence exists.”
Furthermore, the faux outrage will be quickly followed by a visit to the designer fertility expert that can selectively sort genes in germ cells to produce the smartest, most beautiful, (and likely worthless) child.