Labor Economics 5th Edition by George Borjas

Exercise 8

a. Draw the wage-schooling locus for someone for whom the returns to schooling decrease through college but increase after college. (Assume college is completed after 16 years of schooling and that one can receive at most 6 years of post-college schooling.)
b. On a new graph, plot the marginal rate of return to schooling implied by the wage-schooling locus described in part (a).
c. What can be said about a college graduate who faces the wage-schooling locus described in part (a)