https://dnyuz.com/2022/01/31/what-happens-when-colleagues-know-each-others-salaries/
"A new study supports this argument with data.
Tomasz Obloj of HEC Paris and Todd Zenger from the University of Utah’s business school compiled the salaries of almost 100,000 US-based academics in eight states over a period of 14 years. Their findings, set to be published in the journal Nature Human Behaviour later this year, show that pay transparency (which schools in some states practice as a matter of course) had a big effect on both pay equity—how fairly the academics were paid, particularly in regards to gender—and on pay equality—how similarly the academics were paid compared with their peers.
Not surprisingly, once wages and rewards become transparent, there is both internal and external pressure to close those gaps, Obloj observed."