Local global equivalence for unanimous social choice functions

Article Type

Research Article

Publication Title

Games and Economic Behavior

Abstract

We identify a condition on preference domains that ensures that every locally strategy-proof and unanimous random social choice function is also strategy-proof. Furthermore every unanimous, locally strategy-proof deterministic social choice function is also group strategy-proof. The condition identified is significantly weaker than the characterization condition for local-global equivalence without unanimity in Kumar et al. (2020). The condition is not necessary for equivalence with unanimous random/deterministic social choice functions. However, we show the weaker condition of connectedness remains necessary.

First Page

299

Last Page

308

DOI

10.1016/j.geb.2021.08.009

Publication Date

11-1-2021

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