theorem irs_shifts_integration_boundary
{K_eff γ₁ γ₂ T g h : ℝ}
(hK : 0 < K_eff) (hg : 0 < g) (hγ : γ₁ < γ₂) :
irsFirmProfit K_eff γ₁ T g h < irsFirmProfit K_eff γ₂ T g h := by
unfold irsFirmProfit
have hKg : 0 < K_eff * g := mul_pos hK hg
nlinarith## IRS and Firm Scope