theorem strategic_complementarity {J ρ : ℝ} (hJ : 0 < J) (hρ : ρ < 1) : 0 < marginalK J ρ := pigouvian_subsidy_pos hJ hρ
thesis/CESProofs/EntryExit/Equilibria.lean:29
Paper 1c, Section 3: The Participation Game