Since variations in training partly subscribe to explain variations in wages, it’s quite common to distinguish between ‘unadjusted’ and ‘adjusted’ pay differences.
Once the sex pay space is determined by comparing all male and female employees, regardless of variations in worker faculties, the end result may be the natural or unadjusted pay space. Contrary to this, as soon as the space is determined after accounting for underlying variations in education, experience, as well as other facets that matter for the pay space, then your outcome may be the pay gap that is adjusted.
The notion of the adjusted pay space is to help make evaluations within sets of workers with approximately comparable jobs, tenure and training. This enables us to tease out of the degree to which different facets add to seen inequalities.
The after chart, from Blau and Kahn (2017) 8 shows the development of the modified and unadjusted sex pay space in the usa.