The researchers studied why people leave engineering. Their first report, Stemming the Tide, reported on women. It was published and very widely reported. The reporting was largely inaccurate, because the claims that were made were that women were leaving due to discrimination.
If you actually looked at the numbers, that was totally false. The number 1 reason was "didn't like engineering", followed by "too few chances for advancement" and "wanted to start a family".
And of course, being promoted to management was als considered "leaving engineering". But whatever.
That wasn't the kicker. The kicker was that they did a follow-up study on why men left engineering. And it turns out it's for pretty much exactly the same reasons!
Our early analysis suggests that men and women actually appear to leave engineering at roughly the same rate and endorse the same reasons for leaving. Namely, that there were little opportunities for advancement, perceptions of a lack of a supportive organization, lost interests in the field, and conflicts with supervisors. One key difference between men and women was women wanted to leave the workforce to spend time with family
Ba da dum.
And yes, you guessed it: deafening silence. More than a decade later, nothing has been published. My guess is that they can't get it published. It's the same researchers, same topic, at least the same relevance, presumably same quality of work. But it doesn't fit the narrative.
I contacted the principal investigator a number of years ago, and she said to wait a little, they were in the process of getting things published. Since then: crickets.