def effectiveLevelCurvature (net : ComplementarityNetwork J)
(P : HierarchicalPartition J N) (n : Fin N) : ℝ :=
let J_n := levelSize P n
if J_n ≤ 1 then 0
else levelCoupling net P n / (↑J_n * (↑J_n - 1))Endogenous Hierarchy: Network CES ↔ Spectral Hierarchy Bridge