theorem relativeWage_pos {α ρ A_K K A_L L : ℝ}
(hα : 0 < α) (hα1 : α < 1)
(hAK : 0 < A_K) (hAL : 0 < A_L) (hK : 0 < K) (hL : 0 < L) :
0 < relativeWageDTC α ρ A_K K A_L L := by
simp only [relativeWageDTC]
apply mul_pos
· apply mul_pos
· exact div_pos hα (by linarith)
· exact rpow_pos_of_pos (div_pos hAK hAL) ρ
· exact rpow_pos_of_pos (div_pos hK hL) (ρ - 1)Directed Technical Change Extension (Acemoglu 2002)