Template-Type: ReDIF-Paper 1.0 Title: Neutral Optimum in Private-Values Settings Author-Name: Tymofiy Mylovanov Author-Email: mylovanov@gmail.com Author-Name: Thomas Tröger Author-Email: troeger@uni-mannheim.de Classification-JEL: C72, D82 Keywords: informed principal, private values, mechanism design, signaling, neologism Abstract: We show that in informed-principal settings with generalized private values any neutral optimum (Myerson, 1983) is strongly neologism proof (Mylovanov and Tröger, 2012) and hence is a strong unconstrained Pareto optimum in the setting of Maskin and Tirole (1990). Thus, in any setting with a unique strongly neologism-proof solution this concept is equivalent to neutral optimum. We rely on the unifying concept of neo-optimum that we develop in the companion paper Mylovanov and Tröger (2026). The main step is to prove that any neo-optimum is strongly neologism-proof. Note: Length: 32 Creation-Date: 2026-02 Revision-Date: File-URL: https://www.crctr224.de/research/discussion-papers/archive/dp732 File-Format: application/pdf Handle: RePEc:bon:boncrc:CRCTR224_2025_732