Are We Taking the Measure of an Individual's Human Capital?

We've estimated lifetime earnings for individuals based on their past work history and then the current occupation they're in. For the first time we've come up with a methodology to allocate or attribute earnings to the skills that are actually put to work in each role and each job that the person plays. So we're able to bifurcate the skills then into how much of your earnings came because of entry level skills that you had when you entered the workforce versus how much did you start earning because of new skills you acquired while at work.