theorem indicator_classification_foundations (e : TwoWorldEconomy N) :
-- Principle 1: Price world faster than quantity world
(∀ n, epsPQ e n < 1) ∧
-- Principle 2: Relative observables detect K; aggregates do not
(∀ (J : ℕ) (ρ : ℝ), 2 ≤ J → ρ < 1 → 0 < curvatureK J ρ) ∧
curvatureK 2 1 = 0 ∧
-- Principle 4: Administered prices slower than market-clearing
(∀ (v sigma : ℝ), 0 < v → 0 < sigma →
administeredSpeed v sigma < v) :=
⟨fun n => epsPQ_lt_one e n,
fun _ _ hJ hρ => curvatureK_pos hJ hρ,
curvatureK_eq_zero_of_rho_one,
fun _ _ hv hsigma => administered_slower hv hsigma⟩Derivation of Leading and Lagging Economic Indicators