theorem curvature_gain_formula {ρ : ℝ} {N : ℕ} : concentrationWelfareCost ρ N = (1 - ρ) * (1 - bequestHerfindahl N) := by simp only [concentrationWelfareCost, bequestHerfindahl]
thesis/CESProofs/Applications/FairInheritance.lean:364
Fair Inheritance: Taxing Concentration, Not Transfer