The company I work for tries to do this by giving you a "salary ratio" of you to everyone in your peer group (i.e. if your salary ratio is 1.06, you make 1.06x

The company I work for tries to do this by giving you a "salary ratio" of you to everyone in your peer group (i.e. if your salary ratio is 1.06, you make 1.06x the mean salary within your band). By all accounts (verified with private conversations) they go out of their way to ensure women are compensated equally to men, so that's not an issue, but I wouldn't say it's really all that transparent. I don't know what my "peer group" is defined as, and I don't know if the number they give me is total bullshit. It's really hard to provide salary transparency unless you have a spreadsheet with all the variables that go into creating it -- considered a closely guarded secret at most companies. The irony of all of this is that if you provided this to people, they would likely either agree with the formula or have constructive ideas for change.