Weigel has a take on this, and notes that even Richwine’s advisers have backed away from the conclusions that he reached - namely because he overreached on the relationship and implications.

Academics aren’t so concerned with the politics. But they know all too well the risks that come with research connecting IQ and race. At the start of his dissertation, Richwine thanked his three advisers—George Borjas, Christopher Jenks, and Richard Zeckhauser—for being so helpful and so bold. Borjas “helped me navigate the minefield of early graduate school,” he wrote. “Richard Zeckhauser, never someone to shy away from controversial ideas, immediately embraced my work.”
Yet they don’t embrace everything Richwine’s done since. “Jason’s empirical work was careful,” Zeckhauser told me over email. “Moreover, my view is that none of his advisors would have accepted his thesis had he thought that his empirical work was tilted or in error. However, Richwine was too eager to extrapolate his empirical results to inferences for policy.”
Borjas’ own work on immigration and inequality has led to a few two-minutes-hate moments in the press. He wasn’t entirely convinced by Richwine, either.

“I have never worked on anything even remotely related to IQ, so don’t really know what to think about the relation between IQ, immigration, etc,” Borjas told me in an email. “In fact, as I know I told Jason early on since I’ve long believed this, I don’t find the IQ academic work all that interesting. Economic outcomes and IQ are only weakly related, and IQ only measures one kind of ability. I’ve been lucky to have met many high-IQ people in academia who are total losers, and many smart, but not super-smart people, who are incredibly successful because of persistence, motivation, etc. So I just think that, on the whole, the focus on IQ is a bit misguided.”

But Richwine had been fascinated by it, and for a very long time, in an environment that never discouraged it. Anyone who works in Washington and wants to explore the dark arts of race and IQ research is in the right place. The city’s a bit like a college campus, where investigating “taboo” topics is rewarded, especially on the right. A liberal squeals “racism,” and they hear the political correctness cops (most often, the Southern Poverty Law Center) reporting a thinkcrime.