theorem debtSustainable_zero_debt {r_B g d : ℝ} : debtSustainable r_B g 0 d ↔ d ≤ 0 := by simp only [debtSustainable, debtDynamics]; constructor <;> intro h <;> nlinarith
thesis/CESProofs/Macro/TaxStructure.lean:378
Government Tax Structure (Layer 3 of Macro Extension)