We use the theory of abstract convexity to study adverse-selection principal-agent problems and two-sided matching problems, departing from much of the literature by not requiring quasilinear utility. We formulate and characterize a basic underlying implementation duality. We show how this...

This paper investigates conditions under which the adverse selection principal-agent problem can be decomposed into a collection of pointwise maximization problems. The analysis uses an extension of the type assignment approach to optimal nonuniform pricing, pioneered by Goldman, Leland and...

We show that, in environments with independent private values and transferable utility, a privately informed principal can implement a contract that is ex-ante optimal for her. As an application, we consider a bilateral exchange environment (Myerson and Satterthwaite, 1983) in which the...