If I understand Alan's paper correctly (without reading it, of course), he has performed some sort of regression to attribute wages to education, experience, and other factors, all of which he regards as human capital. "Pure" labor is a residual, I would imagine. Not too much should be read into the final result. I agree, though, that coming up with a clear definition of who "the workers" are and a way to separate out their compensation is very important. Peter
