theorem factorAugmentedInner_pos {α ρ A_K K A_L L : ℝ}
(hα : 0 < α) (hα1 : α < 1)
(hAK : 0 < A_K) (hK : 0 < K) (hAL : 0 < A_L) (hL : 0 < L) :
0 < factorAugmentedInner α ρ A_K K A_L L := by
rw [factorAugmentedInner_eq_cesInner]
exact cesInner_pos hα hα1 (mul_pos hAK hK) (mul_pos hAL hL)Directed Technical Change Extension (Acemoglu 2002)