theorem firm_scope_irs_complementarity {γ ρ : ℝ} (hγ : 1 < γ) (hρ : ρ < 1) : 0 < scaleScopeCrossPartialSign γ ρ := by exact scale_scope_complementarity hγ hρ
thesis/CESProofs/Potential/FirmScope.lean:245
## IRS and Firm Scope