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The stability of the roommate problem revisited

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Working paper
Author/s: 
Elena Inarra, Conchi Larrea and Elena Molis
Issue number: 
2010/7
Publisher: 
CORE
Year: 
2010
The lack of stability in some matching problems suggests that alternative solution concepts to the core might be a step towards furthering our understanding of matching market performance. We propose absorbing sets as a solution for the class of roommate problems with strict preferences. This solution, which always exists, either gives the matchings in the core or predicts other matchings when the core is empty. Furthermore, it satisfies the interesting property of outer stability. We also determine the matchings in absorbing sets and find that in the case of multiple absorbing sets a similar structure is shared by all.
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