The organisation that published the above report is now defunct so I have posted a link to the Internet Archive version of it. But, if you search for that file and the second search result (personal preferences turned off in Google, so the generic result coming from Google) is from WikiMANNia. For those not familiar, "The goal of WikiMANNia is to be a comprehensive library of men's issues, antifeminism, men’s movement and criticism of feminism. It is dedicated to helping everyone who defends himself against these injustices by providing arguments and facts." A report like the Labor Department one can easily be miss-read and used as fuel for ideological crazies. This is how misogynist interpret the research,

"Research has clearly shown that the choices that men and women make, in the types of employment they undertake the amount of overtime they are prepared to work, and whether they are prepared to work in remote, dirty and dangerous conditions explain the vast bulk of the wage gap." – WikiMANNia (not recommend reading if you would like to keep your mental health) - http://dougsarchaeology.wordpress.com/2017/03/11/women-archaeologists-make-less-than-men-archaeologists/

Oops, jetzt sind wir schon im englischsprachigen Internet (negativ) aufgefallen.