theorem active_dynamics_iff_nondegen_weights
{N : ℕ} (e : WeightedNSectorEconomy N) (n : Fin N)
(hρ : e.ρ n < 1) (hJ : 2 ≤ e.J n) (hH : sectorHerfindahl e n < 1) :
0 < sectorGeneralCurvature e n := by
exact sectorGeneralCurvature_pos e n hρ hJ hH## Corollary 3b.1: Multi-Scale Pre-Crisis Deceleration