Suppose that schooling (s) is the only variable that affects earnings, and that the equations giving the weekly salaries of male and female workers are given by: wM = 725 + 120s wF = 630 + 85s On average, men have 14.5 years of schooling and women have 13.2 years of schooling. a. What is the male-female wage differential in the labor market? b. Using the Oaxaca decomposition, calculate how much of this wage differential is due to discrimination