theorem common_policy_zero_friction {T_h T_f : ℝ} (h : T_h = T_f) : monetaryDivergenceFriction T_h T_f = 0 := by simp only [monetaryDivergenceFriction, h, sub_self, abs_zero]
thesis/CESProofs/Applications/OpenEconomy.lean:76
Open Economy Monetary Transmission