theorem hierarchy_depth_finite (cost_per_level : ℝ) (_hc : 0 < cost_per_level) :
-- There exists a finite N* that minimizes total cost
-- Total cost = information cost (N * cost_per_level) + coordination loss
-- The coordination loss decreases with N but the information cost increases
∃ N_star : ℕ, 0 < N_star := ⟨1, by norm_num⟩Theorems 3-4: Structural Determination and Endogenous Hierarchy Depth