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Local and Global Consistency Properties for Student Placement

Bettina Klaus () and Flip Klijn

UFAE and IAE Working Papers from Unitat de Fonaments de l'Anàlisi Econòmica (UAB) and Institut d'Anàlisi Econòmica (CSIC)

Abstract: In the context of resource allocation on the basis of priorities, Ergin (2002) identifies a necessary and sufficient condition on the priority structure such that the student-optimal stable mechanism satisfies a consistency principle. Ergin (2002) formulates consistency as a local property based on a fixed population of agents and fixed resources -- we refer to this condition as local consistency and to his condition on the priority structure as local acyclicity. We identify a related but stronger necessary and sufficient condition (unit acyclicity) on the priority structure such that the student-optimal stable mechanism satisfies a more standard global consistency property. Next, we provide necessary and sufficient conditions for the student-optimal stable mechanism to satisfy converse consistency principles. We identify a necessary and sufficient condition (local shift-freeness) on the priority structure such that the student-optimal stable mechanism satisfies local converse consistency. Interestingly, local acyclicity implies local shift-freeness and hence the student-optimal stable mechanism more frequently satisfies local converse consistency than local consistency. Finally, in order for the student-optimal stable mechanism to be globally conversely consistent, one again has to impose unit acyclicity on the priority structure. Hence, unit acyclicity is a necessary and sufficient condition on the priority structure for the student-optimal stable mechanism to satisfy global consistency or global converse consistency.

Keywords: acyclicity; consistency; converse consistency; student placement. (search for similar items in EconPapers)
JEL-codes: D63 C78 (search for similar items in EconPapers)
Pages: 17
Date: 2011-03-11
New Economics Papers: this item is included in nep-gth
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Related works:
Journal Article: Local and global consistency properties for student placement (2013) Downloads
Working Paper: Local and Global Consistency Properties for Student Placement (2011) Downloads
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Persistent link: https://EconPapers.repec.org/RePEc:aub:autbar:866.11

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