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Efficient Kidney Exchange: Coincidence of Wants in a Structured Market

Alvin Roth (), Tayfun Sönmez () and Utku Unver ()

Microeconomics from University Library of Munich, Germany

Abstract: Patients needing kidney transplants may have willing donors who cannot donate to them because of blood or tissue incompatibility. Incompatible patient-donor pairs can exchange donor kidneys with other such pairs. The situation facing such pairs resembles models of the “double coincidence of wants,” and relatively few exchanges have been consummated by decentralized means. As the population of available patient-donor pairs grows, the frequency with which exchanges can be arranged will depend in part on how exchanges are organized. We study the potential frequency of exchanges as a function of the number of patient-donor pairs, and the size of the largest feasible exchange. Developing infrastructure to identify and perform 3-way as well as 2-way exchanges will have a substantial effect on the number of transplants, and will help the most vulnerable patients. Larger than 3- way exchanges have much smaller impact. Larger populations of patient- donor pairs increase the percentage of patients of all kinds who can find exchanges.

JEL-codes: D1 D2 D3 D4 (search for similar items in EconPapers)
Date: 2005-06-01, Revised 2005-06-01
Note: Type of Document - pdf
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Related works:
Working Paper: Efficient Kidney Exchange: Coincidence of Wants in a Structured Market (2005) Downloads
Working Paper: Efficient Kidney Exchange: Coincidence of Wants in a Structured Market (2005) Downloads
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