Suppose that the wage-schooling schedule is
w(s) = 2
k
0
p
s
and that the rate of interest rate is r.
It can be shown that the marginal return to schooling investments is MW(s) = k 0 = p s.
What condition governs the optimal choice of education, s*? If r= 5% and ifk 0 = 5.25, what is the optimal schooling level?