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Exchange of indivisible goods and indifferences: the top trading absorbing sets mechanisms. (English) Zbl 1236.91106

Summary: There is a wide range of economic problems that involve the exchange of indivisible goods with no monetary transfers, starting from the housing market model of the seminal paper by L. Shapley and H. Scarf [J. Math. Econ. 1, 23–37 (1974; Zbl 0281.90014)] to problems such as the kidney exchange or the school choice problem. The classical solution to many of these models is to apply a mechanism called top trading cycles, attributed to David Gale, which satisfies good properties for the case of strict preferences. In this paper, we propose a family of mechanisms, called top trading absorbing sets mechanisms, which generalize the top trading cycles to the general case in which individuals are allowed to report indifferences, while preserving a maximal possible set of its desirable properties.

MSC:

91B68 Matching models
91B60 Trade models
91B32 Resource and cost allocation (including fair division, apportionment, etc.)

Citations:

Zbl 0281.90014

References:

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