nep-des New Economics Papers
on Economic Design
Issue of 2022‒10‒03
two papers chosen by
Guillaume Haeringer, Baruch College and Alex Teytelboym, University of Oxford

  1. Regret-free truth-telling voting rules By R. Pablo Arribillaga; Agust\'in G. Bonifacio; Marcelo Ariel Fernandez
  2. The Existence of Equilibrium Flows By Alfred Galichon; Larry Samuelson; Lucas Vernet

  1. By: R. Pablo Arribillaga; Agust\'in G. Bonifacio; Marcelo Ariel Fernandez
    Abstract: We study the ability of different classes of voting rules to induce agents to report their preferences truthfully, if agents want to avoid regret. First, we show that regret-free truth-telling is equivalent to strategy-proofness among tops-only rules. Then, we focus on three important families of (non-tops-only) voting methods: maxmin, scoring, and Condorcet consistent ones. We prove positive and negative results for both neutral and anonymous versions of maxmin and scoring rules. In several instances we provide necessary and sufficient conditions. We also show that Condorcet consistent rules that satisfy a mild monotonicity requirement are not regret-free truth-telling. Successive elimination rules fail to be regret-free truth-telling despite not satisfying the monotonicity condition. Lastly, we provide two characterizations for the case of three alternatives and two agents.
    Date: 2022–08
  2. By: Alfred Galichon; Larry Samuelson; Lucas Vernet
    Abstract: Galichon, Samuelson and Vernet (2022) introduced a class of problems, equilibrium flow problems, that nests several classical economic models such as bipartite matching models, minimum-cost flow problems and hedonic pricing models. We establish conditions for the existence of equilibrium prices in the equilibrium flow problem, in the process generalizing Hall's theorem.
    Date: 2022–09

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