Title

The Implementation Duality

Document Type

Discussion Paper

Publication Date

3-1-2015

CFDP Number

1993R2

CFDP Revision Date

2018-03-01

CFDP Pages

68

Abstract

Conjugate duality relationships are pervasive in matching and implementation problems and provide much of the structure essential for characterizing stable matches and implementable allocations in models with quasilinear (or transferable) utility. In the absence of quasilinearity, a more abstract duality relationship, known as a Galois connection, takes the role of (generalized) conjugate duality. While weaker, this duality relationship still induces substantial structure. We show that this structure can be used to extend existing results for, and gain new insights into, adverse-selection principal-agent problems and two-sided matching problems without quasilinearity.

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