Wage parity between men and women in the United States is a matter of law. You cannot discriminate in wages and salaries solely on the basis of sex. Yet, in the many years since that became the law of the land, women’s wages have never reached 100% parity.
The Census Bureau’s report titled Income, Poverty and Health Insurance Coverage in the United States: 2008 has contained a section on wage parity between men and women for some time. It does not get much play in the media because it is a sterling record for the Bush administration.