Economic Theory

, Volume 51, Issue 1, pp 191–212

Separability and aggregation of equivalence relations

Research Article

DOI: 10.1007/s00199-011-0601-2

Cite this article as:
Dimitrov, D., Marchant, T. & Mishra, D. Econ Theory (2012) 51: 191. doi:10.1007/s00199-011-0601-2


We provide axiomatic characterizations of two natural families of rules for aggregating equivalence relations: the family of join aggregators and the family of meet aggregators. The central conditions in these characterizations are two separability axioms. Disjunctive separability, neutrality, and unanimity characterize the family of join aggregators. On the other hand, conjunctive separability and unanimity characterize the family of meet aggregators. We show another characterization of the family of meet aggregators using conjunctive separability and two Pareto axioms, Pareto+ and Pareto. If we drop Pareto, then conjunctive separability and Pareto+ characterize the family of meet aggregators along with a trivial aggregator.


Aggregation Equivalence relations Separability Unanimity Pareto axiom 

JEL Classification

C0 D0 

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Dinko Dimitrov
    • 1
  • Thierry Marchant
    • 2
  • Debasis Mishra
    • 3
  1. 1.Saarland UniversitySaarbrückenGermany
  2. 2.Ghent UniversityGhentBelgium
  3. 3.Indian Statistical InstituteNew DelhiIndia

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