Abstract
I introduce the notion of circular domains and prove that on any circular domain there is no strategy-proof and nondictatorial social choice function. Moreover, I show that on any proper subset of a minimal circular domain, there exists a group strategy-proof and essential social choice function. These results together detect the minimal size of the domains over which the incompatibility arises with respect to pairs of democratic-incentive requirements (nondictatorial, strategy-proof) and (essential, group strategy-proof).
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Sato, S. Circular domains. Rev Econ Design 14, 331–342 (2010). https://doi.org/10.1007/s10058-010-0102-y
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DOI: https://doi.org/10.1007/s10058-010-0102-y